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[deliverable/binutils-gdb.git] / bfd / elf32-arm.h
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252b5132 1/* 32-bit ELF support for ARM
5eefb65f 2 Copyright 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
252b5132
RH		 3
4 This file is part of BFD, the Binary File Descriptor library.
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
19
252b5132
RH		 20typedef unsigned long int insn32;
21typedef unsigned short int insn16;
22
23static boolean elf32_arm_set_private_flags
24 PARAMS ((bfd *, flagword));
25static boolean elf32_arm_copy_private_bfd_data
26 PARAMS ((bfd *, bfd *));
27static boolean elf32_arm_merge_private_bfd_data
28 PARAMS ((bfd *, bfd *));
29static boolean elf32_arm_print_private_bfd_data
30 PARAMS ((bfd *, PTR));
f21f3fe0 31static int elf32_arm_get_symbol_type
252b5132
RH		 32 PARAMS (( Elf_Internal_Sym *, int));
33static struct bfd_link_hash_table *elf32_arm_link_hash_table_create
34 PARAMS ((bfd *));
35static bfd_reloc_status_type elf32_arm_final_link_relocate
780a67af
NC		 36 PARAMS ((reloc_howto_type *, bfd *, bfd *, asection *, bfd_byte *,
37 Elf_Internal_Rela *, bfd_vma, struct bfd_link_info *, asection *,
dc810e39 38 const char *, int, struct elf_link_hash_entry *));
252b5132
RH		 39static insn32 insert_thumb_branch
40 PARAMS ((insn32, int));
41static struct elf_link_hash_entry *find_thumb_glue
917583ad 42 PARAMS ((struct bfd_link_info *, const char *, bfd *));
252b5132 43static struct elf_link_hash_entry *find_arm_glue
917583ad 44 PARAMS ((struct bfd_link_info *, const char *, bfd *));
252b5132
RH		 45static void record_arm_to_thumb_glue
46 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
47static void record_thumb_to_arm_glue
48 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
ba96a88f
NC		 49static void elf32_arm_post_process_headers
50 PARAMS ((bfd *, struct bfd_link_info *));
bcbdc74c
NC		 51static int elf32_arm_to_thumb_stub
52 PARAMS ((struct bfd_link_info *, const char *, bfd *, bfd *, asection *,
53 bfd_byte *, asection *, bfd_vma, bfd_signed_vma, bfd_vma));
54static int elf32_thumb_to_arm_stub
55 PARAMS ((struct bfd_link_info *, const char *, bfd *, bfd *, asection *,
56 bfd_byte *, asection *, bfd_vma, bfd_signed_vma, bfd_vma));
917583ad
NC		 57static boolean elf32_arm_relocate_section
58 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
59 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
60static asection * elf32_arm_gc_mark_hook
61 PARAMS ((bfd *, struct bfd_link_info *, Elf_Internal_Rela *,
62 struct elf_link_hash_entry *, Elf_Internal_Sym *));
63static boolean elf32_arm_gc_sweep_hook
64 PARAMS ((bfd *, struct bfd_link_info *, asection *,
65 const Elf_Internal_Rela *));
66static boolean elf32_arm_check_relocs
67 PARAMS ((bfd *, struct bfd_link_info *, asection *,
68 const Elf_Internal_Rela *));
69static boolean elf32_arm_find_nearest_line
70 PARAMS ((bfd *, asection *, asymbol **, bfd_vma, const char **,
71 const char **, unsigned int *));
72static boolean elf32_arm_adjust_dynamic_symbol
73 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
74static boolean elf32_arm_size_dynamic_sections
75 PARAMS ((bfd *, struct bfd_link_info *));
76static boolean elf32_arm_finish_dynamic_symbol
77 PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
78 Elf_Internal_Sym *));
79static boolean elf32_arm_finish_dynamic_sections
80 PARAMS ((bfd *, struct bfd_link_info *));
81static struct bfd_hash_entry * elf32_arm_link_hash_newfunc
82 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
83#ifdef USE_REL
84static void arm_add_to_rel
85 PARAMS ((bfd *, bfd_byte *, reloc_howto_type *, bfd_signed_vma));
86#endif
252b5132 87
917583ad
NC		 88boolean bfd_elf32_arm_allocate_interworking_sections
89 PARAMS ((struct bfd_link_info *));
90boolean bfd_elf32_arm_get_bfd_for_interworking
91 PARAMS ((bfd *, struct bfd_link_info *));
92boolean bfd_elf32_arm_process_before_allocation
93 PARAMS ((bfd *, struct bfd_link_info *, int));
99e4ae17 94static enum elf_reloc_type_class elf32_arm_reloc_type_class
f51e552e 95 PARAMS ((const Elf_Internal_Rela *));
99e4ae17 96
fd2ec330 97#define INTERWORK_FLAG(abfd) (elf_elfheader (abfd)->e_flags & EF_ARM_INTERWORK)
9b485d32 98
252b5132
RH		 99/* The linker script knows the section names for placement.
100 The entry_names are used to do simple name mangling on the stubs.
101 Given a function name, and its type, the stub can be found. The
9b485d32 102 name can be changed. The only requirement is the %s be present. */
252b5132
RH		 103#define THUMB2ARM_GLUE_SECTION_NAME ".glue_7t"
104#define THUMB2ARM_GLUE_ENTRY_NAME "__%s_from_thumb"
105
106#define ARM2THUMB_GLUE_SECTION_NAME ".glue_7"
107#define ARM2THUMB_GLUE_ENTRY_NAME "__%s_from_arm"
108
109/* The name of the dynamic interpreter. This is put in the .interp
110 section. */
111#define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
112
113/* The size in bytes of an entry in the procedure linkage table. */
252b5132
RH		 114#define PLT_ENTRY_SIZE 16
115
116/* The first entry in a procedure linkage table looks like
117 this. It is set up so that any shared library function that is
59f2c4e7 118 called before the relocation has been set up calls the dynamic
9b485d32 119 linker first. */
dc810e39 120static const bfd_vma elf32_arm_plt0_entry [PLT_ENTRY_SIZE / 4] =
917583ad
NC		 121 {
122 0xe52de004, /* str lr, [sp, #-4]! */
123 0xe59fe010, /* ldr lr, [pc, #16] */
124 0xe08fe00e, /* add lr, pc, lr */
125 0xe5bef008 /* ldr pc, [lr, #8]! */
126 };
252b5132
RH		 127
128/* Subsequent entries in a procedure linkage table look like
129 this. */
dc810e39 130static const bfd_vma elf32_arm_plt_entry [PLT_ENTRY_SIZE / 4] =
99e4ae17 131 {
917583ad
NC		 132 0xe59fc004, /* ldr ip, [pc, #4] */
133 0xe08fc00c, /* add ip, pc, ip */
134 0xe59cf000, /* ldr pc, [ip] */
135 0x00000000 /* offset to symbol in got */
136 };
252b5132 137
252b5132
RH		 138/* The ARM linker needs to keep track of the number of relocs that it
139 decides to copy in check_relocs for each symbol. This is so that
140 it can discard PC relative relocs if it doesn't need them when
141 linking with -Bsymbolic. We store the information in a field
142 extending the regular ELF linker hash table. */
143
144/* This structure keeps track of the number of PC relative relocs we
145 have copied for a given symbol. */
252b5132 146struct elf32_arm_pcrel_relocs_copied
917583ad
NC		 147 {
148 /* Next section. */
149 struct elf32_arm_pcrel_relocs_copied * next;
150 /* A section in dynobj. */
151 asection * section;
152 /* Number of relocs copied in this section. */
153 bfd_size_type count;
154 };
252b5132 155
ba96a88f 156/* Arm ELF linker hash entry. */
252b5132 157struct elf32_arm_link_hash_entry
917583ad
NC		 158 {
159 struct elf_link_hash_entry root;
252b5132 160
917583ad
NC		 161 /* Number of PC relative relocs copied for this symbol. */
162 struct elf32_arm_pcrel_relocs_copied * pcrel_relocs_copied;
163 };
252b5132
RH		 164
165/* Declare this now that the above structures are defined. */
252b5132
RH		 166static boolean elf32_arm_discard_copies
167 PARAMS ((struct elf32_arm_link_hash_entry *, PTR));
168
169/* Traverse an arm ELF linker hash table. */
252b5132
RH		 170#define elf32_arm_link_hash_traverse(table, func, info) \
171 (elf_link_hash_traverse \
172 (&(table)->root, \
173 (boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \
174 (info)))
175
176/* Get the ARM elf linker hash table from a link_info structure. */
177#define elf32_arm_hash_table(info) \
178 ((struct elf32_arm_link_hash_table *) ((info)->hash))
179
9b485d32 180/* ARM ELF linker hash table. */
252b5132 181struct elf32_arm_link_hash_table
917583ad
NC		 182 {
183 /* The main hash table. */
184 struct elf_link_hash_table root;
252b5132 185
917583ad 186 /* The size in bytes of the section containg the Thumb-to-ARM glue. */
dc810e39 187 bfd_size_type thumb_glue_size;
252b5132 188
917583ad 189 /* The size in bytes of the section containg the ARM-to-Thumb glue. */
dc810e39 190 bfd_size_type arm_glue_size;
252b5132 191
917583ad
NC		 192 /* An arbitary input BFD chosen to hold the glue sections. */
193 bfd * bfd_of_glue_owner;
ba96a88f 194
917583ad
NC		 195 /* A boolean indicating whether knowledge of the ARM's pipeline
196 length should be applied by the linker. */
197 int no_pipeline_knowledge;
198 };
252b5132 199
780a67af
NC		 200/* Create an entry in an ARM ELF linker hash table. */
201
202static struct bfd_hash_entry *
203elf32_arm_link_hash_newfunc (entry, table, string)
204 struct bfd_hash_entry * entry;
205 struct bfd_hash_table * table;
206 const char * string;
207{
208 struct elf32_arm_link_hash_entry * ret =
209 (struct elf32_arm_link_hash_entry *) entry;
210
211 /* Allocate the structure if it has not already been allocated by a
212 subclass. */
213 if (ret == (struct elf32_arm_link_hash_entry *) NULL)
214 ret = ((struct elf32_arm_link_hash_entry *)
215 bfd_hash_allocate (table,
216 sizeof (struct elf32_arm_link_hash_entry)));
217 if (ret == (struct elf32_arm_link_hash_entry *) NULL)
218 return (struct bfd_hash_entry *) ret;
219
220 /* Call the allocation method of the superclass. */
221 ret = ((struct elf32_arm_link_hash_entry *)
222 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
223 table, string));
224 if (ret != (struct elf32_arm_link_hash_entry *) NULL)
225 ret->pcrel_relocs_copied = NULL;
226
227 return (struct bfd_hash_entry *) ret;
228}
229
9b485d32 230/* Create an ARM elf linker hash table. */
252b5132
RH		 231
232static struct bfd_link_hash_table *
233elf32_arm_link_hash_table_create (abfd)
234 bfd *abfd;
235{
236 struct elf32_arm_link_hash_table *ret;
dc810e39 237 bfd_size_type amt = sizeof (struct elf32_arm_link_hash_table);
252b5132 238
dc810e39 239 ret = (struct elf32_arm_link_hash_table *) bfd_alloc (abfd, amt);
252b5132
RH		 240 if (ret == (struct elf32_arm_link_hash_table *) NULL)
241 return NULL;
242
243 if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
780a67af 244 elf32_arm_link_hash_newfunc))
252b5132
RH		 245 {
246 bfd_release (abfd, ret);
247 return NULL;
248 }
249
250 ret->thumb_glue_size = 0;
251 ret->arm_glue_size = 0;
252 ret->bfd_of_glue_owner = NULL;
ba96a88f 253 ret->no_pipeline_knowledge = 0;
252b5132
RH		 254
255 return &ret->root.root;
256}
257
9b485d32
NC		 258/* Locate the Thumb encoded calling stub for NAME. */
259
252b5132
RH		 260static struct elf_link_hash_entry *
261find_thumb_glue (link_info, name, input_bfd)
262 struct bfd_link_info *link_info;
917583ad 263 const char *name;
252b5132
RH		 264 bfd *input_bfd;
265{
266 char *tmp_name;
267 struct elf_link_hash_entry *hash;
268 struct elf32_arm_link_hash_table *hash_table;
269
270 /* We need a pointer to the armelf specific hash table. */
271 hash_table = elf32_arm_hash_table (link_info);
272
dc810e39
AM		 273 tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen (name)
274 + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1);
252b5132
RH		 275
276 BFD_ASSERT (tmp_name);
277
278 sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name);
279
280 hash = elf_link_hash_lookup
281 (&(hash_table)->root, tmp_name, false, false, true);
282
283 if (hash == NULL)
284 /* xgettext:c-format */
8f615d07
AM		 285 (*_bfd_error_handler) (_("%s: unable to find THUMB glue '%s' for `%s'"),
286 bfd_archive_filename (input_bfd), tmp_name, name);
252b5132
RH		 287
288 free (tmp_name);
289
290 return hash;
291}
292
9b485d32
NC		 293/* Locate the ARM encoded calling stub for NAME. */
294
252b5132
RH		 295static struct elf_link_hash_entry *
296find_arm_glue (link_info, name, input_bfd)
297 struct bfd_link_info *link_info;
917583ad 298 const char *name;
252b5132
RH		 299 bfd *input_bfd;
300{
301 char *tmp_name;
302 struct elf_link_hash_entry *myh;
303 struct elf32_arm_link_hash_table *hash_table;
304
305 /* We need a pointer to the elfarm specific hash table. */
306 hash_table = elf32_arm_hash_table (link_info);
307
dc810e39
AM		 308 tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen (name)
309 + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1);
252b5132
RH		 310
311 BFD_ASSERT (tmp_name);
312
313 sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
314
315 myh = elf_link_hash_lookup
316 (&(hash_table)->root, tmp_name, false, false, true);
317
318 if (myh == NULL)
319 /* xgettext:c-format */
8f615d07
AM		 320 (*_bfd_error_handler) (_("%s: unable to find ARM glue '%s' for `%s'"),
321 bfd_archive_filename (input_bfd), tmp_name, name);
252b5132
RH		 322
323 free (tmp_name);
324
325 return myh;
326}
327
9b485d32 328/* ARM->Thumb glue:
252b5132
RH		 329
330 .arm
331 __func_from_arm:
332 ldr r12, __func_addr
333 bx r12
334 __func_addr:
9b485d32 335 .word func @ behave as if you saw a ARM_32 reloc. */
252b5132
RH		 336
337#define ARM2THUMB_GLUE_SIZE 12
338static const insn32 a2t1_ldr_insn = 0xe59fc000;
339static const insn32 a2t2_bx_r12_insn = 0xe12fff1c;
340static const insn32 a2t3_func_addr_insn = 0x00000001;
341
9b485d32 342/* Thumb->ARM: Thumb->(non-interworking aware) ARM
252b5132
RH		 343
344 .thumb .thumb
345 .align 2 .align 2
346 __func_from_thumb: __func_from_thumb:
347 bx pc push {r6, lr}
348 nop ldr r6, __func_addr
349 .arm mov lr, pc
350 __func_change_to_arm: bx r6
351 b func .arm
352 __func_back_to_thumb:
353 ldmia r13! {r6, lr}
354 bx lr
355 __func_addr:
9b485d32 356 .word func */
252b5132
RH		 357
358#define THUMB2ARM_GLUE_SIZE 8
359static const insn16 t2a1_bx_pc_insn = 0x4778;
360static const insn16 t2a2_noop_insn = 0x46c0;
361static const insn32 t2a3_b_insn = 0xea000000;
362
363static const insn16 t2a1_push_insn = 0xb540;
364static const insn16 t2a2_ldr_insn = 0x4e03;
365static const insn16 t2a3_mov_insn = 0x46fe;
366static const insn16 t2a4_bx_insn = 0x4730;
367static const insn32 t2a5_pop_insn = 0xe8bd4040;
368static const insn32 t2a6_bx_insn = 0xe12fff1e;
369
370boolean
371bfd_elf32_arm_allocate_interworking_sections (info)
372 struct bfd_link_info * info;
373{
374 asection * s;
375 bfd_byte * foo;
376 struct elf32_arm_link_hash_table * globals;
377
378 globals = elf32_arm_hash_table (info);
379
380 BFD_ASSERT (globals != NULL);
381
382 if (globals->arm_glue_size != 0)
383 {
384 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
385
dc810e39
AM		 386 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
387 ARM2THUMB_GLUE_SECTION_NAME);
252b5132
RH		 388
389 BFD_ASSERT (s != NULL);
390
dc810e39
AM		 391 foo = (bfd_byte *) bfd_alloc (globals->bfd_of_glue_owner,
392 globals->arm_glue_size);
252b5132
RH		 393
394 s->_raw_size = s->_cooked_size = globals->arm_glue_size;
395 s->contents = foo;
396 }
397
398 if (globals->thumb_glue_size != 0)
399 {
400 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
401
402 s = bfd_get_section_by_name
403 (globals->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME);
404
405 BFD_ASSERT (s != NULL);
406
dc810e39
AM		 407 foo = (bfd_byte *) bfd_alloc (globals->bfd_of_glue_owner,
408 globals->thumb_glue_size);
252b5132
RH		 409
410 s->_raw_size = s->_cooked_size = globals->thumb_glue_size;
411 s->contents = foo;
412 }
413
414 return true;
415}
416
417static void
418record_arm_to_thumb_glue (link_info, h)
419 struct bfd_link_info * link_info;
420 struct elf_link_hash_entry * h;
421{
422 const char * name = h->root.root.string;
63b0f745 423 asection * s;
252b5132
RH		 424 char * tmp_name;
425 struct elf_link_hash_entry * myh;
426 struct elf32_arm_link_hash_table * globals;
dc810e39 427 bfd_vma val;
252b5132
RH		 428
429 globals = elf32_arm_hash_table (link_info);
430
431 BFD_ASSERT (globals != NULL);
432 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
433
434 s = bfd_get_section_by_name
435 (globals->bfd_of_glue_owner, ARM2THUMB_GLUE_SECTION_NAME);
436
252b5132
RH		 437 BFD_ASSERT (s != NULL);
438
dc810e39
AM		 439 tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen (name)
440 + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1);
252b5132
RH		 441
442 BFD_ASSERT (tmp_name);
443
444 sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
445
446 myh = elf_link_hash_lookup
447 (&(globals)->root, tmp_name, false, false, true);
448
449 if (myh != NULL)
450 {
9b485d32 451 /* We've already seen this guy. */
252b5132 452 free (tmp_name);
9b485d32 453 return;
252b5132
RH		 454 }
455
456 /* The only trick here is using hash_table->arm_glue_size as the value. Even
457 though the section isn't allocated yet, this is where we will be putting
458 it. */
dc810e39
AM		 459 val = globals->arm_glue_size + 1;
460 _bfd_generic_link_add_one_symbol (link_info, globals->bfd_of_glue_owner,
461 tmp_name, BSF_GLOBAL, s, val,
252b5132
RH		 462 NULL, true, false,
463 (struct bfd_link_hash_entry **) &myh);
464
465 free (tmp_name);
466
467 globals->arm_glue_size += ARM2THUMB_GLUE_SIZE;
468
469 return;
470}
471
472static void
473record_thumb_to_arm_glue (link_info, h)
474 struct bfd_link_info *link_info;
475 struct elf_link_hash_entry *h;
476{
477 const char *name = h->root.root.string;
63b0f745 478 asection *s;
252b5132
RH		 479 char *tmp_name;
480 struct elf_link_hash_entry *myh;
481 struct elf32_arm_link_hash_table *hash_table;
482 char bind;
dc810e39 483 bfd_vma val;
252b5132
RH		 484
485 hash_table = elf32_arm_hash_table (link_info);
486
487 BFD_ASSERT (hash_table != NULL);
488 BFD_ASSERT (hash_table->bfd_of_glue_owner != NULL);
489
490 s = bfd_get_section_by_name
491 (hash_table->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME);
492
493 BFD_ASSERT (s != NULL);
494
dc810e39
AM		 495 tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen (name)
496 + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1);
252b5132
RH		 497
498 BFD_ASSERT (tmp_name);
499
500 sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name);
501
502 myh = elf_link_hash_lookup
503 (&(hash_table)->root, tmp_name, false, false, true);
504
505 if (myh != NULL)
506 {
9b485d32 507 /* We've already seen this guy. */
252b5132 508 free (tmp_name);
9b485d32 509 return;
252b5132
RH		 510 }
511
dc810e39
AM		 512 val = hash_table->thumb_glue_size + 1;
513 _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner,
514 tmp_name, BSF_GLOBAL, s, val,
252b5132
RH		 515 NULL, true, false,
516 (struct bfd_link_hash_entry **) &myh);
517
9b485d32 518 /* If we mark it 'Thumb', the disassembler will do a better job. */
252b5132
RH		 519 bind = ELF_ST_BIND (myh->type);
520 myh->type = ELF_ST_INFO (bind, STT_ARM_TFUNC);
521
522 free (tmp_name);
523
252b5132
RH		 524#define CHANGE_TO_ARM "__%s_change_to_arm"
525#define BACK_FROM_ARM "__%s_back_from_arm"
526
9b485d32 527 /* Allocate another symbol to mark where we switch to Arm mode. */
dc810e39
AM		 528 tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen (name)
529 + strlen (CHANGE_TO_ARM) + 1);
252b5132
RH		 530
531 BFD_ASSERT (tmp_name);
532
533 sprintf (tmp_name, CHANGE_TO_ARM, name);
534
535 myh = NULL;
536
dc810e39
AM		 537 val = hash_table->thumb_glue_size + 4,
538 _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner,
539 tmp_name, BSF_LOCAL, s, val,
252b5132
RH		 540 NULL, true, false,
541 (struct bfd_link_hash_entry **) &myh);
542
543 free (tmp_name);
544
545 hash_table->thumb_glue_size += THUMB2ARM_GLUE_SIZE;
546
547 return;
548}
549
550/* Select a BFD to be used to hold the sections used by the glue code.
551 This function is called from the linker scripts in ld/emultempl/
552 {armelf/pe}.em */
9b485d32 553
252b5132
RH		 554boolean
555bfd_elf32_arm_get_bfd_for_interworking (abfd, info)
556 bfd *abfd;
557 struct bfd_link_info *info;
558{
559 struct elf32_arm_link_hash_table *globals;
560 flagword flags;
561 asection *sec;
562
563 /* If we are only performing a partial link do not bother
564 getting a bfd to hold the glue. */
565 if (info->relocateable)
566 return true;
567
568 globals = elf32_arm_hash_table (info);
569
570 BFD_ASSERT (globals != NULL);
571
572 if (globals->bfd_of_glue_owner != NULL)
573 return true;
574
575 sec = bfd_get_section_by_name (abfd, ARM2THUMB_GLUE_SECTION_NAME);
576
577 if (sec == NULL)
578 {
57db232e
NC		 579 /* Note: we do not include the flag SEC_LINKER_CREATED, as this
580 will prevent elf_link_input_bfd() from processing the contents
581 of this section. */
811b4bf6 582 flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_CODE | SEC_READONLY;
252b5132
RH		 583
584 sec = bfd_make_section (abfd, ARM2THUMB_GLUE_SECTION_NAME);
585
586 if (sec == NULL
587 || !bfd_set_section_flags (abfd, sec, flags)
588 || !bfd_set_section_alignment (abfd, sec, 2))
589 return false;
9a5aca8c 590
57db232e
NC		 591 /* Set the gc mark to prevent the section from being removed by garbage
592 collection, despite the fact that no relocs refer to this section. */
593 sec->gc_mark = 1;
252b5132
RH		 594 }
595
596 sec = bfd_get_section_by_name (abfd, THUMB2ARM_GLUE_SECTION_NAME);
597
598 if (sec == NULL)
599 {
811b4bf6 600 flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_CODE | SEC_READONLY;
252b5132
RH		 601
602 sec = bfd_make_section (abfd, THUMB2ARM_GLUE_SECTION_NAME);
603
604 if (sec == NULL
605 || !bfd_set_section_flags (abfd, sec, flags)
606 || !bfd_set_section_alignment (abfd, sec, 2))
607 return false;
9a5aca8c 608
57db232e 609 sec->gc_mark = 1;
252b5132
RH		 610 }
611
612 /* Save the bfd for later use. */
613 globals->bfd_of_glue_owner = abfd;
614
615 return true;
616}
617
618boolean
ba96a88f 619bfd_elf32_arm_process_before_allocation (abfd, link_info, no_pipeline_knowledge)
252b5132
RH		 620 bfd *abfd;
621 struct bfd_link_info *link_info;
ba96a88f 622 int no_pipeline_knowledge;
252b5132
RH		 623{
624 Elf_Internal_Shdr *symtab_hdr;
625 Elf_Internal_Rela *free_relocs = NULL;
626 Elf_Internal_Rela *irel, *irelend;
627 bfd_byte *contents = NULL;
628 bfd_byte *free_contents = NULL;
629 Elf32_External_Sym *extsyms = NULL;
630 Elf32_External_Sym *free_extsyms = NULL;
631
632 asection *sec;
633 struct elf32_arm_link_hash_table *globals;
634
635 /* If we are only performing a partial link do not bother
636 to construct any glue. */
637 if (link_info->relocateable)
638 return true;
639
640 /* Here we have a bfd that is to be included on the link. We have a hook
641 to do reloc rummaging, before section sizes are nailed down. */
252b5132
RH		 642 globals = elf32_arm_hash_table (link_info);
643
644 BFD_ASSERT (globals != NULL);
645 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
646
ba96a88f 647 globals->no_pipeline_knowledge = no_pipeline_knowledge;
f21f3fe0 648
252b5132
RH		 649 /* Rummage around all the relocs and map the glue vectors. */
650 sec = abfd->sections;
651
652 if (sec == NULL)
653 return true;
654
655 for (; sec != NULL; sec = sec->next)
656 {
657 if (sec->reloc_count == 0)
658 continue;
659
660 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
252b5132 661
9b485d32 662 /* Load the relocs. */
252b5132 663 irel = (_bfd_elf32_link_read_relocs (abfd, sec, (PTR) NULL,
dc810e39 664 (Elf_Internal_Rela *) NULL, false));
252b5132
RH		 665
666 BFD_ASSERT (irel != 0);
667
668 irelend = irel + sec->reloc_count;
669 for (; irel < irelend; irel++)
670 {
671 long r_type;
672 unsigned long r_index;
252b5132
RH		 673
674 struct elf_link_hash_entry *h;
675
676 r_type = ELF32_R_TYPE (irel->r_info);
677 r_index = ELF32_R_SYM (irel->r_info);
678
9b485d32 679 /* These are the only relocation types we care about. */
ba96a88f 680 if ( r_type != R_ARM_PC24
252b5132
RH		 681 && r_type != R_ARM_THM_PC22)
682 continue;
683
684 /* Get the section contents if we haven't done so already. */
685 if (contents == NULL)
686 {
687 /* Get cached copy if it exists. */
688 if (elf_section_data (sec)->this_hdr.contents != NULL)
689 contents = elf_section_data (sec)->this_hdr.contents;
690 else
691 {
692 /* Go get them off disk. */
693 contents = (bfd_byte *) bfd_malloc (sec->_raw_size);
694 if (contents == NULL)
695 goto error_return;
9b485d32 696
252b5132
RH		 697 free_contents = contents;
698
699 if (!bfd_get_section_contents (abfd, sec, contents,
dc810e39 700 (file_ptr) 0, sec->_raw_size))
252b5132
RH		 701 goto error_return;
702 }
703 }
704
705 /* Read this BFD's symbols if we haven't done so already. */
706 if (extsyms == NULL)
707 {
708 /* Get cached copy if it exists. */
709 if (symtab_hdr->contents != NULL)
710 extsyms = (Elf32_External_Sym *) symtab_hdr->contents;
711 else
712 {
713 /* Go get them off disk. */
714 extsyms = ((Elf32_External_Sym *)
715 bfd_malloc (symtab_hdr->sh_size));
716 if (extsyms == NULL)
717 goto error_return;
9b485d32 718
252b5132 719 free_extsyms = extsyms;
9b485d32 720
252b5132 721 if (bfd_seek (abfd, symtab_hdr->sh_offset, SEEK_SET) != 0
dc810e39 722 || (bfd_bread (extsyms, symtab_hdr->sh_size, abfd)
252b5132
RH		 723 != symtab_hdr->sh_size))
724 goto error_return;
725 }
726 }
727
a7c10850 728 /* If the relocation is not against a symbol it cannot concern us. */
252b5132
RH		 729 h = NULL;
730
9b485d32 731 /* We don't care about local symbols. */
252b5132
RH		 732 if (r_index < symtab_hdr->sh_info)
733 continue;
734
9b485d32 735 /* This is an external symbol. */
252b5132
RH		 736 r_index -= symtab_hdr->sh_info;
737 h = (struct elf_link_hash_entry *)
738 elf_sym_hashes (abfd)[r_index];
739
740 /* If the relocation is against a static symbol it must be within
741 the current section and so cannot be a cross ARM/Thumb relocation. */
742 if (h == NULL)
743 continue;
744
745 switch (r_type)
746 {
747 case R_ARM_PC24:
748 /* This one is a call from arm code. We need to look up
2f0ca46a 749 the target of the call. If it is a thumb target, we
252b5132 750 insert glue. */
252b5132
RH		 751 if (ELF_ST_TYPE(h->type) == STT_ARM_TFUNC)
752 record_arm_to_thumb_glue (link_info, h);
753 break;
754
755 case R_ARM_THM_PC22:
f21f3fe0 756 /* This one is a call from thumb code. We look
2f0ca46a 757 up the target of the call. If it is not a thumb
bcbdc74c 758 target, we insert glue. */
252b5132
RH		 759 if (ELF_ST_TYPE (h->type) != STT_ARM_TFUNC)
760 record_thumb_to_arm_glue (link_info, h);
761 break;
762
763 default:
764 break;
765 }
766 }
767 }
768
769 return true;
9a5aca8c 770
252b5132
RH		 771error_return:
772 if (free_relocs != NULL)
773 free (free_relocs);
774 if (free_contents != NULL)
775 free (free_contents);
776 if (free_extsyms != NULL)
777 free (free_extsyms);
9a5aca8c 778
252b5132 779 return false;
252b5132
RH		 780}
781
782/* The thumb form of a long branch is a bit finicky, because the offset
783 encoding is split over two fields, each in it's own instruction. They
f21f3fe0 784 can occur in any order. So given a thumb form of long branch, and an
252b5132 785 offset, insert the offset into the thumb branch and return finished
f21f3fe0 786 instruction.
252b5132 787
f21f3fe0 788 It takes two thumb instructions to encode the target address. Each has
252b5132 789 11 bits to invest. The upper 11 bits are stored in one (identifed by
f21f3fe0
UD		 790 H-0.. see below), the lower 11 bits are stored in the other (identified
791 by H-1).
252b5132 792
f21f3fe0 793 Combine together and shifted left by 1 (it's a half word address) and
252b5132
RH		 794 there you have it.
795
796 Op: 1111 = F,
797 H-0, upper address-0 = 000
798 Op: 1111 = F,
799 H-1, lower address-0 = 800
800
f21f3fe0 801 They can be ordered either way, but the arm tools I've seen always put
252b5132
RH		 802 the lower one first. It probably doesn't matter. krk@cygnus.com
803
804 XXX: Actually the order does matter. The second instruction (H-1)
805 moves the computed address into the PC, so it must be the second one
806 in the sequence. The problem, however is that whilst little endian code
807 stores the instructions in HI then LOW order, big endian code does the
dfc5f959 808 reverse. nickc@cygnus.com. */
252b5132 809
dfc5f959
NC		 810#define LOW_HI_ORDER 0xF800F000
811#define HI_LOW_ORDER 0xF000F800
252b5132
RH		 812
813static insn32
814insert_thumb_branch (br_insn, rel_off)
815 insn32 br_insn;
816 int rel_off;
817{
818 unsigned int low_bits;
819 unsigned int high_bits;
820
252b5132
RH		 821 BFD_ASSERT ((rel_off & 1) != 1);
822
dfc5f959
NC		 823 rel_off >>= 1; /* Half word aligned address. */
824 low_bits = rel_off & 0x000007FF; /* The bottom 11 bits. */
825 high_bits = (rel_off >> 11) & 0x000007FF; /* The top 11 bits. */
252b5132
RH		 826
827 if ((br_insn & LOW_HI_ORDER) == LOW_HI_ORDER)
828 br_insn = LOW_HI_ORDER | (low_bits << 16) | high_bits;
829 else if ((br_insn & HI_LOW_ORDER) == HI_LOW_ORDER)
830 br_insn = HI_LOW_ORDER | (high_bits << 16) | low_bits;
831 else
9b485d32
NC		 832 /* FIXME: abort is probably not the right call. krk@cygnus.com */
833 abort (); /* error - not a valid branch instruction form. */
252b5132 834
252b5132
RH		 835 return br_insn;
836}
837
9b485d32
NC		 838/* Thumb code calling an ARM function. */
839
252b5132
RH		 840static int
841elf32_thumb_to_arm_stub (info, name, input_bfd, output_bfd, input_section,
842 hit_data, sym_sec, offset, addend, val)
bcbdc74c
NC		 843 struct bfd_link_info * info;
844 const char * name;
845 bfd * input_bfd;
846 bfd * output_bfd;
847 asection * input_section;
848 bfd_byte * hit_data;
849 asection * sym_sec;
850 bfd_vma offset;
851 bfd_signed_vma addend;
852 bfd_vma val;
252b5132 853{
bcbdc74c 854 asection * s = 0;
dc810e39 855 bfd_vma my_offset;
252b5132
RH		 856 unsigned long int tmp;
857 long int ret_offset;
bcbdc74c
NC		 858 struct elf_link_hash_entry * myh;
859 struct elf32_arm_link_hash_table * globals;
252b5132
RH		 860
861 myh = find_thumb_glue (info, name, input_bfd);
862 if (myh == NULL)
863 return false;
864
865 globals = elf32_arm_hash_table (info);
866
867 BFD_ASSERT (globals != NULL);
868 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
869
870 my_offset = myh->root.u.def.value;
871
872 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
873 THUMB2ARM_GLUE_SECTION_NAME);
874
875 BFD_ASSERT (s != NULL);
876 BFD_ASSERT (s->contents != NULL);
877 BFD_ASSERT (s->output_section != NULL);
878
879 if ((my_offset & 0x01) == 0x01)
880 {
881 if (sym_sec != NULL
882 && sym_sec->owner != NULL
883 && !INTERWORK_FLAG (sym_sec->owner))
884 {
8f615d07 885 (*_bfd_error_handler)
9b485d32 886 (_("%s(%s): warning: interworking not enabled."),
8f615d07
AM		 887 bfd_archive_filename (sym_sec->owner), name);
888 (*_bfd_error_handler)
9b485d32 889 (_(" first occurrence: %s: thumb call to arm"),
8f615d07 890 bfd_archive_filename (input_bfd));
252b5132
RH		 891
892 return false;
893 }
894
895 --my_offset;
896 myh->root.u.def.value = my_offset;
897
dc810e39 898 bfd_put_16 (output_bfd, (bfd_vma) t2a1_bx_pc_insn,
252b5132
RH		 899 s->contents + my_offset);
900
dc810e39 901 bfd_put_16 (output_bfd, (bfd_vma) t2a2_noop_insn,
252b5132
RH		 902 s->contents + my_offset + 2);
903
904 ret_offset =
9b485d32
NC		 905 /* Address of destination of the stub. */
906 ((bfd_signed_vma) val)
252b5132 907 - ((bfd_signed_vma)
9b485d32
NC		 908 /* Offset from the start of the current section to the start of the stubs. */
909 (s->output_offset
910 /* Offset of the start of this stub from the start of the stubs. */
911 + my_offset
912 /* Address of the start of the current section. */
913 + s->output_section->vma)
914 /* The branch instruction is 4 bytes into the stub. */
915 + 4
916 /* ARM branches work from the pc of the instruction + 8. */
917 + 8);
252b5132
RH		 918
919 bfd_put_32 (output_bfd,
dc810e39 920 (bfd_vma) t2a3_b_insn | ((ret_offset >> 2) & 0x00FFFFFF),
252b5132
RH		 921 s->contents + my_offset + 4);
922 }
923
924 BFD_ASSERT (my_offset <= globals->thumb_glue_size);
925
926 /* Now go back and fix up the original BL insn to point
927 to here. */
dc810e39
AM		 928 ret_offset = (s->output_offset
929 + my_offset
930 - (input_section->output_offset
931 + offset + addend)
932 - 8);
252b5132
RH		 933
934 tmp = bfd_get_32 (input_bfd, hit_data
935 - input_section->vma);
936
937 bfd_put_32 (output_bfd,
dc810e39 938 (bfd_vma) insert_thumb_branch (tmp, ret_offset),
252b5132
RH		 939 hit_data - input_section->vma);
940
941 return true;
942}
943
9b485d32
NC		 944/* Arm code calling a Thumb function. */
945
252b5132
RH		 946static int
947elf32_arm_to_thumb_stub (info, name, input_bfd, output_bfd, input_section,
948 hit_data, sym_sec, offset, addend, val)
bcbdc74c
NC		 949 struct bfd_link_info * info;
950 const char * name;
951 bfd * input_bfd;
952 bfd * output_bfd;
953 asection * input_section;
954 bfd_byte * hit_data;
955 asection * sym_sec;
956 bfd_vma offset;
957 bfd_signed_vma addend;
958 bfd_vma val;
252b5132
RH		 959{
960 unsigned long int tmp;
dc810e39 961 bfd_vma my_offset;
bcbdc74c 962 asection * s;
252b5132 963 long int ret_offset;
bcbdc74c
NC		 964 struct elf_link_hash_entry * myh;
965 struct elf32_arm_link_hash_table * globals;
252b5132
RH		 966
967 myh = find_arm_glue (info, name, input_bfd);
968 if (myh == NULL)
969 return false;
970
971 globals = elf32_arm_hash_table (info);
972
973 BFD_ASSERT (globals != NULL);
974 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
975
976 my_offset = myh->root.u.def.value;
977 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
978 ARM2THUMB_GLUE_SECTION_NAME);
979 BFD_ASSERT (s != NULL);
980 BFD_ASSERT (s->contents != NULL);
981 BFD_ASSERT (s->output_section != NULL);
982
983 if ((my_offset & 0x01) == 0x01)
984 {
985 if (sym_sec != NULL
986 && sym_sec->owner != NULL
987 && !INTERWORK_FLAG (sym_sec->owner))
988 {
8f615d07 989 (*_bfd_error_handler)
9b485d32 990 (_("%s(%s): warning: interworking not enabled."),
8f615d07
AM		 991 bfd_archive_filename (sym_sec->owner), name);
992 (*_bfd_error_handler)
9b485d32 993 (_(" first occurrence: %s: arm call to thumb"),
8f615d07 994 bfd_archive_filename (input_bfd));
252b5132 995 }
9b485d32 996
252b5132
RH		 997 --my_offset;
998 myh->root.u.def.value = my_offset;
999
dc810e39 1000 bfd_put_32 (output_bfd, (bfd_vma) a2t1_ldr_insn,
252b5132
RH		 1001 s->contents + my_offset);
1002
dc810e39 1003 bfd_put_32 (output_bfd, (bfd_vma) a2t2_bx_r12_insn,
252b5132
RH		 1004 s->contents + my_offset + 4);
1005
1006 /* It's a thumb address. Add the low order bit. */
1007 bfd_put_32 (output_bfd, val | a2t3_func_addr_insn,
1008 s->contents + my_offset + 8);
1009 }
1010
1011 BFD_ASSERT (my_offset <= globals->arm_glue_size);
1012
1013 tmp = bfd_get_32 (input_bfd, hit_data);
1014 tmp = tmp & 0xFF000000;
1015
9b485d32 1016 /* Somehow these are both 4 too far, so subtract 8. */
dc810e39
AM		 1017 ret_offset = (s->output_offset
1018 + my_offset
1019 + s->output_section->vma
1020 - (input_section->output_offset
1021 + input_section->output_section->vma
1022 + offset + addend)
1023 - 8);
9a5aca8c 1024
252b5132
RH		 1025 tmp = tmp | ((ret_offset >> 2) & 0x00FFFFFF);
1026
dc810e39 1027 bfd_put_32 (output_bfd, (bfd_vma) tmp, hit_data - input_section->vma);
252b5132 1028
252b5132
RH		 1029 return true;
1030}
1031
1032/* Perform a relocation as part of a final link. */
9b485d32 1033
252b5132
RH		 1034static bfd_reloc_status_type
1035elf32_arm_final_link_relocate (howto, input_bfd, output_bfd,
1036 input_section, contents, rel, value,
780a67af 1037 info, sym_sec, sym_name, sym_flags, h)
252b5132
RH		 1038 reloc_howto_type * howto;
1039 bfd * input_bfd;
1040 bfd * output_bfd;
1041 asection * input_section;
1042 bfd_byte * contents;
1043 Elf_Internal_Rela * rel;
1044 bfd_vma value;
1045 struct bfd_link_info * info;
1046 asection * sym_sec;
1047 const char * sym_name;
dc810e39 1048 int sym_flags;
780a67af 1049 struct elf_link_hash_entry * h;
252b5132
RH		 1050{
1051 unsigned long r_type = howto->type;
1052 unsigned long r_symndx;
1053 bfd_byte * hit_data = contents + rel->r_offset;
1054 bfd * dynobj = NULL;
1055 Elf_Internal_Shdr * symtab_hdr;
1056 struct elf_link_hash_entry ** sym_hashes;
1057 bfd_vma * local_got_offsets;
1058 asection * sgot = NULL;
1059 asection * splt = NULL;
1060 asection * sreloc = NULL;
252b5132 1061 bfd_vma addend;
ba96a88f
NC		 1062 bfd_signed_vma signed_addend;
1063 struct elf32_arm_link_hash_table * globals;
f21f3fe0 1064
cac15327
NC		 1065 /* If the start address has been set, then set the EF_ARM_HASENTRY
1066 flag. Setting this more than once is redundant, but the cost is
1067 not too high, and it keeps the code simple.
99e4ae17 1068
cac15327
NC		 1069 The test is done here, rather than somewhere else, because the
1070 start address is only set just before the final link commences.
1071
1072 Note - if the user deliberately sets a start address of 0, the
1073 flag will not be set. */
1074 if (bfd_get_start_address (output_bfd) != 0)
1075 elf_elfheader (output_bfd)->e_flags |= EF_ARM_HASENTRY;
99e4ae17 1076
ba96a88f 1077 globals = elf32_arm_hash_table (info);
f21f3fe0 1078
252b5132
RH		 1079 dynobj = elf_hash_table (info)->dynobj;
1080 if (dynobj)
1081 {
1082 sgot = bfd_get_section_by_name (dynobj, ".got");
1083 splt = bfd_get_section_by_name (dynobj, ".plt");
1084 }
1085 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
1086 sym_hashes = elf_sym_hashes (input_bfd);
1087 local_got_offsets = elf_local_got_offsets (input_bfd);
1088 r_symndx = ELF32_R_SYM (rel->r_info);
1089
1090#ifdef USE_REL
ba96a88f
NC		 1091 addend = bfd_get_32 (input_bfd, hit_data) & howto->src_mask;
1092
1093 if (addend & ((howto->src_mask + 1) >> 1))
1094 {
1095 signed_addend = -1;
1096 signed_addend &= ~ howto->src_mask;
1097 signed_addend |= addend;
1098 }
1099 else
1100 signed_addend = addend;
252b5132 1101#else
ba96a88f 1102 addend = signed_addend = rel->r_addend;
252b5132 1103#endif
f21f3fe0 1104
252b5132
RH		 1105 switch (r_type)
1106 {
1107 case R_ARM_NONE:
1108 return bfd_reloc_ok;
1109
1110 case R_ARM_PC24:
1111 case R_ARM_ABS32:
1112 case R_ARM_REL32:
dfc5f959
NC		 1113#ifndef OLD_ARM_ABI
1114 case R_ARM_XPC25:
1115#endif
252b5132 1116 /* When generating a shared object, these relocations are copied
9b485d32 1117 into the output file to be resolved at run time. */
252b5132 1118 if (info->shared
ec338859 1119 && r_symndx != 0
252b5132 1120 && (r_type != R_ARM_PC24
99e4ae17 1121 || (h != NULL
252b5132
RH		 1122 && h->dynindx != -1
1123 && (! info->symbolic
1124 || (h->elf_link_hash_flags
1125 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
1126 {
1127 Elf_Internal_Rel outrel;
1128 boolean skip, relocate;
f21f3fe0 1129
252b5132
RH		 1130 if (sreloc == NULL)
1131 {
1132 const char * name;
f21f3fe0 1133
252b5132
RH		 1134 name = (bfd_elf_string_from_elf_section
1135 (input_bfd,
1136 elf_elfheader (input_bfd)->e_shstrndx,
1137 elf_section_data (input_section)->rel_hdr.sh_name));
1138 if (name == NULL)
1139 return bfd_reloc_notsupported;
f21f3fe0 1140
252b5132
RH		 1141 BFD_ASSERT (strncmp (name, ".rel", 4) == 0
1142 && strcmp (bfd_get_section_name (input_bfd,
1143 input_section),
1144 name + 4) == 0);
f21f3fe0 1145
252b5132
RH		 1146 sreloc = bfd_get_section_by_name (dynobj, name);
1147 BFD_ASSERT (sreloc != NULL);
1148 }
f21f3fe0 1149
252b5132 1150 skip = false;
f21f3fe0 1151
c629eae0
JJ		 1152 outrel.r_offset =
1153 _bfd_elf_section_offset (output_bfd, info, input_section,
1154 rel->r_offset);
1155 if (outrel.r_offset == (bfd_vma) -1)
1156 skip = true;
252b5132
RH		 1157 outrel.r_offset += (input_section->output_section->vma
1158 + input_section->output_offset);
f21f3fe0 1159
252b5132
RH		 1160 if (skip)
1161 {
1162 memset (&outrel, 0, sizeof outrel);
1163 relocate = false;
1164 }
1165 else if (r_type == R_ARM_PC24)
1166 {
1167 BFD_ASSERT (h != NULL && h->dynindx != -1);
1168 if ((input_section->flags & SEC_ALLOC) != 0)
1169 relocate = false;
1170 else
1171 relocate = true;
1172 outrel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_PC24);
1173 }
1174 else
1175 {
1176 if (h == NULL
1177 || ((info->symbolic || h->dynindx == -1)
1178 && (h->elf_link_hash_flags
1179 & ELF_LINK_HASH_DEF_REGULAR) != 0))
1180 {
1181 relocate = true;
1182 outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
1183 }
1184 else
1185 {
1186 BFD_ASSERT (h->dynindx != -1);
1187 if ((input_section->flags & SEC_ALLOC) != 0)
1188 relocate = false;
1189 else
1190 relocate = true;
1191 outrel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_ABS32);
1192 }
1193 }
f21f3fe0 1194
252b5132
RH		 1195 bfd_elf32_swap_reloc_out (output_bfd, &outrel,
1196 (((Elf32_External_Rel *)
1197 sreloc->contents)
1198 + sreloc->reloc_count));
1199 ++sreloc->reloc_count;
9a5aca8c 1200
f21f3fe0 1201 /* If this reloc is against an external symbol, we do not want to
252b5132 1202 fiddle with the addend. Otherwise, we need to include the symbol
9b485d32 1203 value so that it becomes an addend for the dynamic reloc. */
252b5132
RH		 1204 if (! relocate)
1205 return bfd_reloc_ok;
9a5aca8c 1206
f21f3fe0 1207 return _bfd_final_link_relocate (howto, input_bfd, input_section,
252b5132
RH		 1208 contents, rel->r_offset, value,
1209 (bfd_vma) 0);
1210 }
1211 else switch (r_type)
1212 {
dfc5f959
NC		 1213#ifndef OLD_ARM_ABI
1214 case R_ARM_XPC25: /* Arm BLX instruction. */
1215#endif
1216 case R_ARM_PC24: /* Arm B/BL instruction */
1217#ifndef OLD_ARM_ABI
1218 if (r_type == R_ARM_XPC25)
252b5132 1219 {
dfc5f959
NC		 1220 /* Check for Arm calling Arm function. */
1221 /* FIXME: Should we translate the instruction into a BL
1222 instruction instead ? */
1223 if (sym_flags != STT_ARM_TFUNC)
8f615d07 1224 (*_bfd_error_handler) (_("\
dfc5f959 1225%s: Warning: Arm BLX instruction targets Arm function '%s'."),
8f615d07
AM		 1226 bfd_archive_filename (input_bfd),
1227 h ? h->root.root.string : "(local)");
dfc5f959
NC		 1228 }
1229 else
1230#endif
1231 {
1232 /* Check for Arm calling Thumb function. */
1233 if (sym_flags == STT_ARM_TFUNC)
1234 {
1235 elf32_arm_to_thumb_stub (info, sym_name, input_bfd, output_bfd,
1236 input_section, hit_data, sym_sec, rel->r_offset,
1237 signed_addend, value);
1238 return bfd_reloc_ok;
1239 }
252b5132 1240 }
ba96a88f
NC		 1241
1242 if ( strcmp (bfd_get_target (input_bfd), "elf32-littlearm-oabi") == 0
1243 || strcmp (bfd_get_target (input_bfd), "elf32-bigarm-oabi") == 0)
1244 {
1245 /* The old way of doing things. Trearing the addend as a
1246 byte sized field and adding in the pipeline offset. */
ba96a88f
NC		 1247 value -= (input_section->output_section->vma
1248 + input_section->output_offset);
1249 value -= rel->r_offset;
1250 value += addend;
f21f3fe0 1251
ba96a88f
NC		 1252 if (! globals->no_pipeline_knowledge)
1253 value -= 8;
1254 }
1255 else
1256 {
1257 /* The ARM ELF ABI says that this reloc is computed as: S - P + A
1258 where:
1259 S is the address of the symbol in the relocation.
1260 P is address of the instruction being relocated.
1261 A is the addend (extracted from the instruction) in bytes.
f21f3fe0 1262
ba96a88f
NC		 1263 S is held in 'value'.
1264 P is the base address of the section containing the instruction
1265 plus the offset of the reloc into that section, ie:
1266 (input_section->output_section->vma +
1267 input_section->output_offset +
1268 rel->r_offset).
1269 A is the addend, converted into bytes, ie:
1270 (signed_addend * 4)
1271
1272 Note: None of these operations have knowledge of the pipeline
1273 size of the processor, thus it is up to the assembler to encode
1274 this information into the addend. */
ba96a88f
NC		 1275 value -= (input_section->output_section->vma
1276 + input_section->output_offset);
1277 value -= rel->r_offset;
1278 value += (signed_addend << howto->size);
f21f3fe0 1279
ba96a88f
NC		 1280 /* Previous versions of this code also used to add in the pipeline
1281 offset here. This is wrong because the linker is not supposed
1282 to know about such things, and one day it might change. In order
1283 to support old binaries that need the old behaviour however, so
1284 we attempt to detect which ABI was used to create the reloc. */
1285 if (! globals->no_pipeline_knowledge)
f21f3fe0 1286 {
ba96a88f 1287 Elf_Internal_Ehdr * i_ehdrp; /* Elf file header, internal form */
f21f3fe0 1288
ba96a88f 1289 i_ehdrp = elf_elfheader (input_bfd);
f21f3fe0 1290
ba96a88f
NC		 1291 if (i_ehdrp->e_ident[EI_OSABI] == 0)
1292 value -= 8;
1293 }
1294 }
23080146 1295
dcb5e6e6
NC		 1296 signed_addend = value;
1297 signed_addend >>= howto->rightshift;
9a5aca8c 1298
59f2c4e7
NC		 1299 /* It is not an error for an undefined weak reference to be
1300 out of range. Any program that branches to such a symbol
9a5aca8c
AM		 1301 is going to crash anyway, so there is no point worrying
1302 about getting the destination exactly right. */
59f2c4e7
NC		 1303 if (! h || h->root.type != bfd_link_hash_undefweak)
1304 {
9b485d32 1305 /* Perform a signed range check. */
dcb5e6e6 1306 if ( signed_addend > ((bfd_signed_vma) (howto->dst_mask >> 1))
59f2c4e7
NC		 1307 || signed_addend < - ((bfd_signed_vma) ((howto->dst_mask + 1) >> 1)))
1308 return bfd_reloc_overflow;
1309 }
9a5aca8c 1310
dcb5e6e6
NC		 1311#ifndef OLD_ARM_ABI
1312 /* If necessary set the H bit in the BLX instruction. */
1313 if (r_type == R_ARM_XPC25 && ((value & 2) == 2))
1314 value = (signed_addend & howto->dst_mask)
1315 | (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask))
1316 | (1 << 24);
1317 else
1318#endif
1319 value = (signed_addend & howto->dst_mask)
1320 | (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask));
252b5132 1321 break;
f21f3fe0 1322
252b5132
RH		 1323 case R_ARM_ABS32:
1324 value += addend;
1325 if (sym_flags == STT_ARM_TFUNC)
1326 value |= 1;
1327 break;
f21f3fe0 1328
252b5132
RH		 1329 case R_ARM_REL32:
1330 value -= (input_section->output_section->vma
62efb346 1331 + input_section->output_offset + rel->r_offset);
252b5132
RH		 1332 value += addend;
1333 break;
1334 }
f21f3fe0 1335
252b5132
RH		 1336 bfd_put_32 (input_bfd, value, hit_data);
1337 return bfd_reloc_ok;
1338
1339 case R_ARM_ABS8:
1340 value += addend;
1341 if ((long) value > 0x7f || (long) value < -0x80)
1342 return bfd_reloc_overflow;
1343
1344 bfd_put_8 (input_bfd, value, hit_data);
1345 return bfd_reloc_ok;
1346
1347 case R_ARM_ABS16:
1348 value += addend;
1349
1350 if ((long) value > 0x7fff || (long) value < -0x8000)
1351 return bfd_reloc_overflow;
1352
1353 bfd_put_16 (input_bfd, value, hit_data);
1354 return bfd_reloc_ok;
1355
1356 case R_ARM_ABS12:
1357 /* Support ldr and str instruction for the arm */
1358 /* Also thumb b (unconditional branch). ??? Really? */
1359 value += addend;
1360
1361 if ((long) value > 0x7ff || (long) value < -0x800)
1362 return bfd_reloc_overflow;
1363
1364 value |= (bfd_get_32 (input_bfd, hit_data) & 0xfffff000);
1365 bfd_put_32 (input_bfd, value, hit_data);
1366 return bfd_reloc_ok;
1367
1368 case R_ARM_THM_ABS5:
9b485d32 1369 /* Support ldr and str instructions for the thumb. */
252b5132
RH		 1370#ifdef USE_REL
1371 /* Need to refetch addend. */
1372 addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask;
1373 /* ??? Need to determine shift amount from operand size. */
1374 addend >>= howto->rightshift;
1375#endif
1376 value += addend;
1377
1378 /* ??? Isn't value unsigned? */
1379 if ((long) value > 0x1f || (long) value < -0x10)
1380 return bfd_reloc_overflow;
1381
1382 /* ??? Value needs to be properly shifted into place first. */
1383 value |= bfd_get_16 (input_bfd, hit_data) & 0xf83f;
1384 bfd_put_16 (input_bfd, value, hit_data);
1385 return bfd_reloc_ok;
1386
dfc5f959
NC		 1387#ifndef OLD_ARM_ABI
1388 case R_ARM_THM_XPC22:
1389#endif
252b5132 1390 case R_ARM_THM_PC22:
dfc5f959 1391 /* Thumb BL (branch long instruction). */
252b5132 1392 {
ba96a88f
NC		 1393 bfd_vma relocation;
1394 boolean overflow = false;
1395 bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data);
1396 bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2);
252b5132 1397 bfd_signed_vma reloc_signed_max = (1 << (howto->bitsize - 1)) - 1;
ba96a88f
NC		 1398 bfd_signed_vma reloc_signed_min = ~ reloc_signed_max;
1399 bfd_vma check;
252b5132 1400 bfd_signed_vma signed_check;
252b5132
RH		 1401
1402#ifdef USE_REL
1403 /* Need to refetch the addend and squish the two 11 bit pieces
1404 together. */
1405 {
ba96a88f
NC		 1406 bfd_vma upper = upper_insn & 0x7ff;
1407 bfd_vma lower = lower_insn & 0x7ff;
9b485d32 1408 upper = (upper ^ 0x400) - 0x400; /* Sign extend. */
252b5132 1409 addend = (upper << 12) | (lower << 1);
ba96a88f 1410 signed_addend = addend;
252b5132
RH		 1411 }
1412#endif
dfc5f959
NC		 1413#ifndef OLD_ARM_ABI
1414 if (r_type == R_ARM_THM_XPC22)
1415 {
1416 /* Check for Thumb to Thumb call. */
1417 /* FIXME: Should we translate the instruction into a BL
1418 instruction instead ? */
1419 if (sym_flags == STT_ARM_TFUNC)
8f615d07 1420 (*_bfd_error_handler) (_("\
dfc5f959 1421%s: Warning: Thumb BLX instruction targets thumb function '%s'."),
8f615d07
AM		 1422 bfd_archive_filename (input_bfd),
1423 h ? h->root.root.string : "(local)");
dfc5f959
NC		 1424 }
1425 else
1426#endif
252b5132 1427 {
dfc5f959
NC		 1428 /* If it is not a call to Thumb, assume call to Arm.
1429 If it is a call relative to a section name, then it is not a
1430 function call at all, but rather a long jump. */
1431 if (sym_flags != STT_ARM_TFUNC && sym_flags != STT_SECTION)
1432 {
1433 if (elf32_thumb_to_arm_stub
1434 (info, sym_name, input_bfd, output_bfd, input_section,
1435 hit_data, sym_sec, rel->r_offset, signed_addend, value))
1436 return bfd_reloc_ok;
1437 else
1438 return bfd_reloc_dangerous;
1439 }
252b5132 1440 }
f21f3fe0 1441
ba96a88f 1442 relocation = value + signed_addend;
f21f3fe0 1443
252b5132 1444 relocation -= (input_section->output_section->vma
ba96a88f
NC		 1445 + input_section->output_offset
1446 + rel->r_offset);
9a5aca8c 1447
ba96a88f
NC		 1448 if (! globals->no_pipeline_knowledge)
1449 {
9b485d32 1450 Elf_Internal_Ehdr * i_ehdrp; /* Elf file header, internal form. */
9a5aca8c 1451
ba96a88f 1452 i_ehdrp = elf_elfheader (input_bfd);
f21f3fe0 1453
ba96a88f
NC		 1454 /* Previous versions of this code also used to add in the pipline
1455 offset here. This is wrong because the linker is not supposed
1456 to know about such things, and one day it might change. In order
1457 to support old binaries that need the old behaviour however, so
1458 we attempt to detect which ABI was used to create the reloc. */
1459 if ( strcmp (bfd_get_target (input_bfd), "elf32-littlearm-oabi") == 0
1460 || strcmp (bfd_get_target (input_bfd), "elf32-bigarm-oabi") == 0
1461 || i_ehdrp->e_ident[EI_OSABI] == 0)
1462 relocation += 4;
1463 }
f21f3fe0 1464
252b5132
RH		 1465 check = relocation >> howto->rightshift;
1466
1467 /* If this is a signed value, the rightshift just dropped
1468 leading 1 bits (assuming twos complement). */
1469 if ((bfd_signed_vma) relocation >= 0)
1470 signed_check = check;
1471 else
1472 signed_check = check | ~((bfd_vma) -1 >> howto->rightshift);
1473
252b5132 1474 /* Assumes two's complement. */
ba96a88f 1475 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
252b5132
RH		 1476 overflow = true;
1477
1478 /* Put RELOCATION back into the insn. */
1479 upper_insn = (upper_insn & ~(bfd_vma) 0x7ff) | ((relocation >> 12) & 0x7ff);
1480 lower_insn = (lower_insn & ~(bfd_vma) 0x7ff) | ((relocation >> 1) & 0x7ff);
1481
df425bc0 1482#ifndef OLD_ARM_ABI
4f3c3dbb
NC		 1483 if (r_type == R_ARM_THM_XPC22
1484 && ((lower_insn & 0x1800) == 0x0800))
1485 /* Remove bit zero of the adjusted offset. Bit zero can only be
1486 set if the upper insn is at a half-word boundary, since the
1487 destination address, an ARM instruction, must always be on a
1488 word boundary. The semantics of the BLX (1) instruction, however,
1489 are that bit zero in the offset must always be zero, and the
1490 corresponding bit one in the target address will be set from bit
1491 one of the source address. */
1492 lower_insn &= ~1;
99e4ae17 1493#endif
252b5132
RH		 1494 /* Put the relocated value back in the object file: */
1495 bfd_put_16 (input_bfd, upper_insn, hit_data);
1496 bfd_put_16 (input_bfd, lower_insn, hit_data + 2);
1497
1498 return (overflow ? bfd_reloc_overflow : bfd_reloc_ok);
1499 }
1500 break;
1501
1502 case R_ARM_GNU_VTINHERIT:
1503 case R_ARM_GNU_VTENTRY:
1504 return bfd_reloc_ok;
1505
1506 case R_ARM_COPY:
1507 return bfd_reloc_notsupported;
1508
1509 case R_ARM_GLOB_DAT:
1510 return bfd_reloc_notsupported;
1511
1512 case R_ARM_JUMP_SLOT:
1513 return bfd_reloc_notsupported;
1514
1515 case R_ARM_RELATIVE:
1516 return bfd_reloc_notsupported;
1517
1518 case R_ARM_GOTOFF:
1519 /* Relocation is relative to the start of the
1520 global offset table. */
1521
1522 BFD_ASSERT (sgot != NULL);
1523 if (sgot == NULL)
1524 return bfd_reloc_notsupported;
9a5aca8c 1525
252b5132
RH		 1526 /* Note that sgot->output_offset is not involved in this
1527 calculation. We always want the start of .got. If we
1528 define _GLOBAL_OFFSET_TABLE in a different way, as is
1529 permitted by the ABI, we might have to change this
9b485d32 1530 calculation. */
252b5132 1531 value -= sgot->output_section->vma;
f21f3fe0 1532 return _bfd_final_link_relocate (howto, input_bfd, input_section,
99e4ae17
AJ		 1533 contents, rel->r_offset, value,
1534 (bfd_vma) 0);
252b5132
RH		 1535
1536 case R_ARM_GOTPC:
a7c10850 1537 /* Use global offset table as symbol value. */
252b5132 1538 BFD_ASSERT (sgot != NULL);
f21f3fe0 1539
252b5132
RH		 1540 if (sgot == NULL)
1541 return bfd_reloc_notsupported;
1542
1543 value = sgot->output_section->vma;
f21f3fe0 1544 return _bfd_final_link_relocate (howto, input_bfd, input_section,
99e4ae17
AJ		 1545 contents, rel->r_offset, value,
1546 (bfd_vma) 0);
f21f3fe0 1547
252b5132
RH		 1548 case R_ARM_GOT32:
1549 /* Relocation is to the entry for this symbol in the
9b485d32 1550 global offset table. */
252b5132
RH		 1551 if (sgot == NULL)
1552 return bfd_reloc_notsupported;
f21f3fe0 1553
252b5132
RH		 1554 if (h != NULL)
1555 {
1556 bfd_vma off;
f21f3fe0 1557
252b5132
RH		 1558 off = h->got.offset;
1559 BFD_ASSERT (off != (bfd_vma) -1);
f21f3fe0 1560
252b5132
RH		 1561 if (!elf_hash_table (info)->dynamic_sections_created ||
1562 (info->shared && (info->symbolic || h->dynindx == -1)
1563 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)))
1564 {
1565 /* This is actually a static link, or it is a -Bsymbolic link
1566 and the symbol is defined locally. We must initialize this
1567 entry in the global offset table. Since the offset must
1568 always be a multiple of 4, we use the least significant bit
1569 to record whether we have initialized it already.
f21f3fe0 1570
252b5132 1571 When doing a dynamic link, we create a .rel.got relocation
f21f3fe0 1572 entry to initialize the value. This is done in the
9b485d32 1573 finish_dynamic_symbol routine. */
252b5132
RH		 1574 if ((off & 1) != 0)
1575 off &= ~1;
1576 else
1577 {
1578 bfd_put_32 (output_bfd, value, sgot->contents + off);
1579 h->got.offset |= 1;
1580 }
1581 }
f21f3fe0 1582
252b5132
RH		 1583 value = sgot->output_offset + off;
1584 }
1585 else
1586 {
1587 bfd_vma off;
f21f3fe0 1588
252b5132
RH		 1589 BFD_ASSERT (local_got_offsets != NULL &&
1590 local_got_offsets[r_symndx] != (bfd_vma) -1);
f21f3fe0 1591
252b5132 1592 off = local_got_offsets[r_symndx];
f21f3fe0 1593
252b5132
RH		 1594 /* The offset must always be a multiple of 4. We use the
1595 least significant bit to record whether we have already
9b485d32 1596 generated the necessary reloc. */
252b5132
RH		 1597 if ((off & 1) != 0)
1598 off &= ~1;
1599 else
1600 {
1601 bfd_put_32 (output_bfd, value, sgot->contents + off);
f21f3fe0 1602
252b5132
RH		 1603 if (info->shared)
1604 {
1605 asection * srelgot;
1606 Elf_Internal_Rel outrel;
f21f3fe0 1607
252b5132
RH		 1608 srelgot = bfd_get_section_by_name (dynobj, ".rel.got");
1609 BFD_ASSERT (srelgot != NULL);
f21f3fe0 1610
252b5132 1611 outrel.r_offset = (sgot->output_section->vma
f21f3fe0 1612 + sgot->output_offset
252b5132
RH		 1613 + off);
1614 outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
1615 bfd_elf32_swap_reloc_out (output_bfd, &outrel,
1616 (((Elf32_External_Rel *)
1617 srelgot->contents)
1618 + srelgot->reloc_count));
1619 ++srelgot->reloc_count;
1620 }
f21f3fe0 1621
252b5132
RH		 1622 local_got_offsets[r_symndx] |= 1;
1623 }
f21f3fe0 1624
252b5132
RH		 1625 value = sgot->output_offset + off;
1626 }
9a5aca8c 1627
f21f3fe0 1628 return _bfd_final_link_relocate (howto, input_bfd, input_section,
99e4ae17
AJ		 1629 contents, rel->r_offset, value,
1630 (bfd_vma) 0);
f21f3fe0 1631
252b5132
RH		 1632 case R_ARM_PLT32:
1633 /* Relocation is to the entry for this symbol in the
1634 procedure linkage table. */
1635
1636 /* Resolve a PLT32 reloc against a local symbol directly,
9b485d32 1637 without using the procedure linkage table. */
252b5132
RH		 1638 if (h == NULL)
1639 return _bfd_final_link_relocate (howto, input_bfd, input_section,
99e4ae17
AJ		 1640 contents, rel->r_offset, value,
1641 (bfd_vma) 0);
252b5132
RH		 1642
1643 if (h->plt.offset == (bfd_vma) -1)
1644 /* We didn't make a PLT entry for this symbol. This
1645 happens when statically linking PIC code, or when
1646 using -Bsymbolic. */
1647 return _bfd_final_link_relocate (howto, input_bfd, input_section,
1648 contents, rel->r_offset, value,
1649 (bfd_vma) 0);
1650
1651 BFD_ASSERT(splt != NULL);
1652 if (splt == NULL)
1653 return bfd_reloc_notsupported;
1654
1655 value = (splt->output_section->vma
1656 + splt->output_offset
1657 + h->plt.offset);
1658 return _bfd_final_link_relocate (howto, input_bfd, input_section,
99e4ae17
AJ		 1659 contents, rel->r_offset, value,
1660 (bfd_vma) 0);
f21f3fe0 1661
252b5132
RH		 1662 case R_ARM_SBREL32:
1663 return bfd_reloc_notsupported;
1664
1665 case R_ARM_AMP_VCALL9:
1666 return bfd_reloc_notsupported;
1667
1668 case R_ARM_RSBREL32:
1669 return bfd_reloc_notsupported;
1670
1671 case R_ARM_THM_RPC22:
1672 return bfd_reloc_notsupported;
1673
1674 case R_ARM_RREL32:
1675 return bfd_reloc_notsupported;
1676
1677 case R_ARM_RABS32:
1678 return bfd_reloc_notsupported;
1679
1680 case R_ARM_RPC24:
1681 return bfd_reloc_notsupported;
1682
1683 case R_ARM_RBASE:
1684 return bfd_reloc_notsupported;
1685
1686 default:
1687 return bfd_reloc_notsupported;
1688 }
1689}
1690
98c1d4aa
NC		 1691#ifdef USE_REL
1692/* Add INCREMENT to the reloc (of type HOWTO) at ADDRESS. */
1693static void
1694arm_add_to_rel (abfd, address, howto, increment)
1695 bfd * abfd;
59f2c4e7 1696 bfd_byte * address;
98c1d4aa
NC		 1697 reloc_howto_type * howto;
1698 bfd_signed_vma increment;
1699{
98c1d4aa
NC		 1700 bfd_signed_vma addend;
1701
9a5aca8c 1702 if (howto->type == R_ARM_THM_PC22)
98c1d4aa 1703 {
9a5aca8c
AM		 1704 int upper_insn, lower_insn;
1705 int upper, lower;
98c1d4aa 1706
9a5aca8c
AM		 1707 upper_insn = bfd_get_16 (abfd, address);
1708 lower_insn = bfd_get_16 (abfd, address + 2);
1709 upper = upper_insn & 0x7ff;
1710 lower = lower_insn & 0x7ff;
1711
1712 addend = (upper << 12) | (lower << 1);
ddda4409 1713 addend += increment;
9a5aca8c 1714 addend >>= 1;
98c1d4aa 1715
9a5aca8c
AM		 1716 upper_insn = (upper_insn & 0xf800) | ((addend >> 11) & 0x7ff);
1717 lower_insn = (lower_insn & 0xf800) | (addend & 0x7ff);
1718
dc810e39
AM		 1719 bfd_put_16 (abfd, (bfd_vma) upper_insn, address);
1720 bfd_put_16 (abfd, (bfd_vma) lower_insn, address + 2);
9a5aca8c
AM		 1721 }
1722 else
1723 {
1724 bfd_vma contents;
1725
1726 contents = bfd_get_32 (abfd, address);
1727
1728 /* Get the (signed) value from the instruction. */
1729 addend = contents & howto->src_mask;
1730 if (addend & ((howto->src_mask + 1) >> 1))
1731 {
1732 bfd_signed_vma mask;
1733
1734 mask = -1;
1735 mask &= ~ howto->src_mask;
1736 addend |= mask;
1737 }
1738
1739 /* Add in the increment, (which is a byte value). */
1740 switch (howto->type)
1741 {
1742 default:
1743 addend += increment;
1744 break;
1745
1746 case R_ARM_PC24:
1747 addend <<= howto->size;
dc810e39 1748 addend += increment;
9a5aca8c
AM		 1749
1750 /* Should we check for overflow here ? */
1751
1752 /* Drop any undesired bits. */
1753 addend >>= howto->rightshift;
1754 break;
1755 }
1756
1757 contents = (contents & ~ howto->dst_mask) | (addend & howto->dst_mask);
1758
1759 bfd_put_32 (abfd, contents, address);
ddda4409 1760 }
98c1d4aa
NC		 1761}
1762#endif /* USE_REL */
252b5132
RH		 1763
1764/* Relocate an ARM ELF section. */
1765static boolean
1766elf32_arm_relocate_section (output_bfd, info, input_bfd, input_section,
1767 contents, relocs, local_syms, local_sections)
1768 bfd * output_bfd;
1769 struct bfd_link_info * info;
1770 bfd * input_bfd;
1771 asection * input_section;
1772 bfd_byte * contents;
1773 Elf_Internal_Rela * relocs;
1774 Elf_Internal_Sym * local_syms;
1775 asection ** local_sections;
1776{
1777 Elf_Internal_Shdr * symtab_hdr;
1778 struct elf_link_hash_entry ** sym_hashes;
1779 Elf_Internal_Rela * rel;
1780 Elf_Internal_Rela * relend;
1781 const char * name;
1782
1783 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
1784 sym_hashes = elf_sym_hashes (input_bfd);
1785
1786 rel = relocs;
1787 relend = relocs + input_section->reloc_count;
1788 for (; rel < relend; rel++)
1789 {
ba96a88f
NC		 1790 int r_type;
1791 reloc_howto_type * howto;
1792 unsigned long r_symndx;
1793 Elf_Internal_Sym * sym;
1794 asection * sec;
252b5132 1795 struct elf_link_hash_entry * h;
ba96a88f
NC		 1796 bfd_vma relocation;
1797 bfd_reloc_status_type r;
1798 arelent bfd_reloc;
f21f3fe0 1799
252b5132 1800 r_symndx = ELF32_R_SYM (rel->r_info);
ba96a88f 1801 r_type = ELF32_R_TYPE (rel->r_info);
252b5132 1802
ba96a88f
NC		 1803 if ( r_type == R_ARM_GNU_VTENTRY
1804 || r_type == R_ARM_GNU_VTINHERIT)
252b5132
RH		 1805 continue;
1806
dc810e39
AM		 1807#ifdef USE_REL
1808 elf32_arm_info_to_howto (input_bfd, & bfd_reloc,
1809 (Elf_Internal_Rel *) rel);
1810#else
1811 elf32_arm_info_to_howto (input_bfd, & bfd_reloc, rel);
1812#endif
ba96a88f 1813 howto = bfd_reloc.howto;
252b5132
RH		 1814
1815 if (info->relocateable)
1816 {
1817 /* This is a relocateable link. We don't have to change
1818 anything, unless the reloc is against a section symbol,
1819 in which case we have to adjust according to where the
1820 section symbol winds up in the output section. */
1821 if (r_symndx < symtab_hdr->sh_info)
1822 {
1823 sym = local_syms + r_symndx;
1824 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
1825 {
1826 sec = local_sections[r_symndx];
1827#ifdef USE_REL
98c1d4aa 1828 arm_add_to_rel (input_bfd, contents + rel->r_offset,
dc810e39
AM		 1829 howto,
1830 (bfd_signed_vma) (sec->output_offset
1831 + sym->st_value));
252b5132 1832#else
5fb1c3f2 1833 rel->r_addend += (sec->output_offset + sym->st_value);
252b5132
RH		 1834#endif
1835 }
1836 }
1837
1838 continue;
1839 }
1840
1841 /* This is a final link. */
1842 h = NULL;
1843 sym = NULL;
1844 sec = NULL;
9b485d32 1845
252b5132
RH		 1846 if (r_symndx < symtab_hdr->sh_info)
1847 {
1848 sym = local_syms + r_symndx;
1849 sec = local_sections[r_symndx];
f8df10f4 1850#ifdef USE_REL
252b5132
RH		 1851 relocation = (sec->output_section->vma
1852 + sec->output_offset
1853 + sym->st_value);
f8df10f4
JJ		 1854 if ((sec->flags & SEC_MERGE)
1855 && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
1856 {
1857 asection *msec;
1858 bfd_vma addend, value;
1859
1860 if (howto->rightshift)
1861 {
1862 (*_bfd_error_handler)
1863 (_("%s(%s+0x%lx): %s relocation against SEC_MERGE section"),
1864 bfd_archive_filename (input_bfd),
1865 bfd_get_section_name (input_bfd, input_section),
1866 (long) rel->r_offset, howto->name);
1867 return false;
1868 }
1869
1870 value = bfd_get_32 (input_bfd, contents + rel->r_offset);
1871
1872 /* Get the (signed) value from the instruction. */
1873 addend = value & howto->src_mask;
1874 if (addend & ((howto->src_mask + 1) >> 1))
1875 {
1876 bfd_signed_vma mask;
1877
1878 mask = -1;
1879 mask &= ~ howto->src_mask;
1880 addend |= mask;
1881 }
1882 msec = sec;
1883 addend =
c629eae0 1884 _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend)
f8df10f4
JJ		 1885 - relocation;
1886 addend += msec->output_section->vma + msec->output_offset;
1887 value = (value & ~ howto->dst_mask) | (addend & howto->dst_mask);
1888 bfd_put_32 (input_bfd, value, contents + rel->r_offset);
1889 }
1890#else
1891 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel);
1892#endif
252b5132
RH		 1893 }
1894 else
1895 {
1896 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
9b485d32
NC		 1897
1898 while ( h->root.type == bfd_link_hash_indirect
252b5132
RH		 1899 || h->root.type == bfd_link_hash_warning)
1900 h = (struct elf_link_hash_entry *) h->root.u.i.link;
9b485d32
NC		 1901
1902 if ( h->root.type == bfd_link_hash_defined
252b5132
RH		 1903 || h->root.type == bfd_link_hash_defweak)
1904 {
780a67af 1905 int relocation_needed = 1;
f21f3fe0 1906
780a67af 1907 sec = h->root.u.def.section;
f21f3fe0 1908
252b5132 1909 /* In these cases, we don't need the relocation value.
f21f3fe0 1910 We check specially because in some obscure cases
9b485d32 1911 sec->output_section will be NULL. */
252b5132
RH		 1912 switch (r_type)
1913 {
1914 case R_ARM_PC24:
1915 case R_ARM_ABS32:
6a360bf4 1916 case R_ARM_THM_PC22:
252b5132
RH		 1917 if (info->shared
1918 && (
99e4ae17 1919 (!info->symbolic && h->dynindx != -1)
97eaf9de 1920 || (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0
252b5132 1921 )
05924f36
PB		 1922 && ((input_section->flags & SEC_ALLOC) != 0
1923 /* DWARF will emit R_ARM_ABS32 relocations in its
1924 sections against symbols defined externally
1925 in shared libraries. We can't do anything
1926 with them here. */
1927 || ((input_section->flags & SEC_DEBUGGING) != 0
1928 && (h->elf_link_hash_flags
1929 & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
252b5132 1930 )
780a67af 1931 relocation_needed = 0;
252b5132 1932 break;
f21f3fe0 1933
252b5132 1934 case R_ARM_GOTPC:
780a67af 1935 relocation_needed = 0;
252b5132 1936 break;
f21f3fe0 1937
252b5132
RH		 1938 case R_ARM_GOT32:
1939 if (elf_hash_table(info)->dynamic_sections_created
1940 && (!info->shared
1941 || (!info->symbolic && h->dynindx != -1)
1942 || (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0
1943 )
1944 )
780a67af 1945 relocation_needed = 0;
252b5132 1946 break;
f21f3fe0 1947
252b5132
RH		 1948 case R_ARM_PLT32:
1949 if (h->plt.offset != (bfd_vma)-1)
780a67af 1950 relocation_needed = 0;
252b5132 1951 break;
f21f3fe0 1952
252b5132
RH		 1953 default:
1954 if (sec->output_section == NULL)
1955 {
1956 (*_bfd_error_handler)
6a360bf4
NC		 1957 (_("%s: warning: unresolvable relocation %d against symbol `%s' from %s section"),
1958 bfd_archive_filename (input_bfd),
1959 r_type,
1960 h->root.root.string,
252b5132 1961 bfd_get_section_name (input_bfd, input_section));
780a67af 1962 relocation_needed = 0;
252b5132
RH		 1963 }
1964 }
780a67af
NC		 1965
1966 if (relocation_needed)
1967 relocation = h->root.u.def.value
1968 + sec->output_section->vma
1969 + sec->output_offset;
1970 else
1971 relocation = 0;
252b5132
RH		 1972 }
1973 else if (h->root.type == bfd_link_hash_undefweak)
1974 relocation = 0;
3a27a730
L		 1975 else if (info->shared && !info->symbolic
1976 && !info->no_undefined
1977 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
a72747a3 1978 relocation = 0;
252b5132
RH		 1979 else
1980 {
1981 if (!((*info->callbacks->undefined_symbol)
1982 (info, h->root.root.string, input_bfd,
5cc7c785 1983 input_section, rel->r_offset,
3a27a730
L		 1984 (!info->shared || info->no_undefined
1985 || ELF_ST_VISIBILITY (h->other)))))
252b5132
RH		 1986 return false;
1987 relocation = 0;
1988 }
1989 }
1990
1991 if (h != NULL)
1992 name = h->root.root.string;
1993 else
1994 {
1995 name = (bfd_elf_string_from_elf_section
1996 (input_bfd, symtab_hdr->sh_link, sym->st_name));
1997 if (name == NULL || *name == '\0')
1998 name = bfd_section_name (input_bfd, sec);
1999 }
f21f3fe0 2000
252b5132
RH		 2001 r = elf32_arm_final_link_relocate (howto, input_bfd, output_bfd,
2002 input_section, contents, rel,
2003 relocation, info, sec, name,
2004 (h ? ELF_ST_TYPE (h->type) :
780a67af 2005 ELF_ST_TYPE (sym->st_info)), h);
252b5132
RH		 2006
2007 if (r != bfd_reloc_ok)
2008 {
2009 const char * msg = (const char *) 0;
2010
2011 switch (r)
2012 {
2013 case bfd_reloc_overflow:
cf919dfd
PB		 2014 /* If the overflowing reloc was to an undefined symbol,
2015 we have already printed one error message and there
2016 is no point complaining again. */
2017 if ((! h ||
2018 h->root.type != bfd_link_hash_undefined)
2019 && (!((*info->callbacks->reloc_overflow)
2020 (info, name, howto->name, (bfd_vma) 0,
2021 input_bfd, input_section, rel->r_offset))))
2022 return false;
252b5132
RH		 2023 break;
2024
2025 case bfd_reloc_undefined:
2026 if (!((*info->callbacks->undefined_symbol)
2027 (info, name, input_bfd, input_section,
5cc7c785 2028 rel->r_offset, true)))
252b5132
RH		 2029 return false;
2030 break;
2031
2032 case bfd_reloc_outofrange:
9b485d32 2033 msg = _("internal error: out of range error");
252b5132
RH		 2034 goto common_error;
2035
2036 case bfd_reloc_notsupported:
9b485d32 2037 msg = _("internal error: unsupported relocation error");
252b5132
RH		 2038 goto common_error;
2039
2040 case bfd_reloc_dangerous:
9b485d32 2041 msg = _("internal error: dangerous error");
252b5132
RH		 2042 goto common_error;
2043
2044 default:
9b485d32 2045 msg = _("internal error: unknown error");
252b5132
RH		 2046 /* fall through */
2047
2048 common_error:
2049 if (!((*info->callbacks->warning)
2050 (info, msg, name, input_bfd, input_section,
2051 rel->r_offset)))
2052 return false;
2053 break;
2054 }
2055 }
2056 }
2057
2058 return true;
2059}
2060
fc830a83 2061/* Function to keep ARM specific flags in the ELF header. */
252b5132
RH		 2062static boolean
2063elf32_arm_set_private_flags (abfd, flags)
2064 bfd *abfd;
2065 flagword flags;
2066{
2067 if (elf_flags_init (abfd)
2068 && elf_elfheader (abfd)->e_flags != flags)
2069 {
fc830a83
NC		 2070 if (EF_ARM_EABI_VERSION (flags) == EF_ARM_EABI_UNKNOWN)
2071 {
fd2ec330 2072 if (flags & EF_ARM_INTERWORK)
8f615d07 2073 (*_bfd_error_handler) (_("\
252b5132 2074Warning: Not setting interwork flag of %s since it has already been specified as non-interworking"),
8f615d07 2075 bfd_archive_filename (abfd));
fc830a83 2076 else
63b0f745 2077 _bfd_error_handler (_("\
252b5132 2078Warning: Clearing the interwork flag of %s due to outside request"),
63b0f745 2079 bfd_archive_filename (abfd));
fc830a83 2080 }
252b5132
RH		 2081 }
2082 else
2083 {
2084 elf_elfheader (abfd)->e_flags = flags;
2085 elf_flags_init (abfd) = true;
2086 }
2087
2088 return true;
2089}
2090
fc830a83 2091/* Copy backend specific data from one object module to another. */
9b485d32 2092
252b5132
RH		 2093static boolean
2094elf32_arm_copy_private_bfd_data (ibfd, obfd)
2095 bfd *ibfd;
2096 bfd *obfd;
2097{
2098 flagword in_flags;
2099 flagword out_flags;
2100
fc830a83 2101 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
252b5132
RH		 2102 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
2103 return true;
2104
fc830a83 2105 in_flags = elf_elfheader (ibfd)->e_flags;
252b5132
RH		 2106 out_flags = elf_elfheader (obfd)->e_flags;
2107
fc830a83
NC		 2108 if (elf_flags_init (obfd)
2109 && EF_ARM_EABI_VERSION (out_flags) == EF_ARM_EABI_UNKNOWN
2110 && in_flags != out_flags)
252b5132 2111 {
252b5132 2112 /* Cannot mix APCS26 and APCS32 code. */
fd2ec330 2113 if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
252b5132
RH		 2114 return false;
2115
2116 /* Cannot mix float APCS and non-float APCS code. */
fd2ec330 2117 if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
252b5132
RH		 2118 return false;
2119
2120 /* If the src and dest have different interworking flags
2121 then turn off the interworking bit. */
fd2ec330 2122 if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
252b5132 2123 {
fd2ec330 2124 if (out_flags & EF_ARM_INTERWORK)
63b0f745 2125 _bfd_error_handler (_("\
252b5132 2126Warning: Clearing the interwork flag in %s because non-interworking code in %s has been linked with it"),
06317a27 2127 bfd_get_filename (obfd),
63b0f745 2128 bfd_archive_filename (ibfd));
252b5132 2129
fd2ec330 2130 in_flags &= ~EF_ARM_INTERWORK;
252b5132 2131 }
1006ba19
PB		 2132
2133 /* Likewise for PIC, though don't warn for this case. */
fd2ec330
PB		 2134 if ((in_flags & EF_ARM_PIC) != (out_flags & EF_ARM_PIC))
2135 in_flags &= ~EF_ARM_PIC;
252b5132
RH		 2136 }
2137
2138 elf_elfheader (obfd)->e_flags = in_flags;
2139 elf_flags_init (obfd) = true;
2140
2141 return true;
2142}
2143
2144/* Merge backend specific data from an object file to the output
2145 object file when linking. */
9b485d32 2146
252b5132
RH		 2147static boolean
2148elf32_arm_merge_private_bfd_data (ibfd, obfd)
fc830a83
NC		 2149 bfd * ibfd;
2150 bfd * obfd;
252b5132
RH		 2151{
2152 flagword out_flags;
2153 flagword in_flags;
1006ba19 2154 boolean flags_compatible = true;
cf919dfd
PB		 2155 boolean null_input_bfd = true;
2156 asection *sec;
252b5132 2157
9b485d32 2158 /* Check if we have the same endianess. */
1fe494a5
NC		 2159 if (_bfd_generic_verify_endian_match (ibfd, obfd) == false)
2160 return false;
2161
252b5132
RH		 2162 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
2163 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
2164 return true;
2165
252b5132
RH		 2166 /* The input BFD must have had its flags initialised. */
2167 /* The following seems bogus to me -- The flags are initialized in
2168 the assembler but I don't think an elf_flags_init field is
9b485d32 2169 written into the object. */
252b5132
RH		 2170 /* BFD_ASSERT (elf_flags_init (ibfd)); */
2171
2172 in_flags = elf_elfheader (ibfd)->e_flags;
2173 out_flags = elf_elfheader (obfd)->e_flags;
2174
2175 if (!elf_flags_init (obfd))
2176 {
fe077fa6
NC		 2177 /* If the input is the default architecture and had the default
2178 flags then do not bother setting the flags for the output
2179 architecture, instead allow future merges to do this. If no
2180 future merges ever set these flags then they will retain their
2181 uninitialised values, which surprise surprise, correspond
252b5132 2182 to the default values. */
fe077fa6
NC		 2183 if (bfd_get_arch_info (ibfd)->the_default
2184 && elf_elfheader (ibfd)->e_flags == 0)
252b5132
RH		 2185 return true;
2186
2187 elf_flags_init (obfd) = true;
2188 elf_elfheader (obfd)->e_flags = in_flags;
2189
2190 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
2191 && bfd_get_arch_info (obfd)->the_default)
2192 return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd));
2193
2194 return true;
2195 }
2196
1006ba19 2197 /* Identical flags must be compatible. */
252b5132
RH		 2198 if (in_flags == out_flags)
2199 return true;
2200
cf919dfd
PB		 2201 /* Check to see if the input BFD actually contains any sections.
2202 If not, its flags may not have been initialised either, but it cannot
2203 actually cause any incompatibility. */
2204 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
2205 {
2206 /* Ignore synthetic glue sections. */
2207 if (strcmp (sec->name, ".glue_7")
2208 && strcmp (sec->name, ".glue_7t"))
2209 {
2210 null_input_bfd = false;
2211 break;
2212 }
2213 }
2214 if (null_input_bfd)
2215 return true;
2216
252b5132 2217 /* Complain about various flag mismatches. */
fc830a83
NC		 2218 if (EF_ARM_EABI_VERSION (in_flags) != EF_ARM_EABI_VERSION (out_flags))
2219 {
63b0f745 2220 _bfd_error_handler (_("\
fc830a83 2221Error: %s compiled for EABI version %d, whereas %s is compiled for version %d"),
63b0f745
NC		 2222 bfd_archive_filename (ibfd),
2223 (in_flags & EF_ARM_EABIMASK) >> 24,
06317a27 2224 bfd_get_filename (obfd),
63b0f745 2225 (out_flags & EF_ARM_EABIMASK) >> 24);
1006ba19 2226 return false;
fc830a83 2227 }
252b5132 2228
1006ba19
PB		 2229 /* Not sure what needs to be checked for EABI versions >= 1. */
2230 if (EF_ARM_EABI_VERSION (in_flags) == EF_ARM_EABI_UNKNOWN)
2231 {
fd2ec330 2232 if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
1006ba19 2233 {
63b0f745 2234 _bfd_error_handler (_("\
252b5132 2235Error: %s compiled for APCS-%d, whereas %s is compiled for APCS-%d"),
63b0f745
NC		 2236 bfd_archive_filename (ibfd),
2237 in_flags & EF_ARM_APCS_26 ? 26 : 32,
06317a27 2238 bfd_get_filename (obfd),
63b0f745 2239 out_flags & EF_ARM_APCS_26 ? 26 : 32);
1006ba19
PB		 2240 flags_compatible = false;
2241 }
252b5132 2242
fd2ec330 2243 if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
1006ba19 2244 {
5eefb65f
NC		 2245 if (in_flags & EF_ARM_APCS_FLOAT)
2246 _bfd_error_handler (_("\
2247Error: %s passes floats in FP registers, whereas %s passes them in integer registers"),
2248 bfd_archive_filename (ibfd),
2249 bfd_get_filename (obfd));
2250 else
2251 _bfd_error_handler (_("\
2252Error: %s passes floats in integer registers, whereas %s passes them in FP registers"),
2253 bfd_archive_filename (ibfd),
2254 bfd_get_filename (obfd));
63b0f745 2255
1006ba19
PB		 2256 flags_compatible = false;
2257 }
252b5132 2258
fd2ec330
PB		 2259#ifdef EF_ARM_SOFT_FLOAT
2260 if ((in_flags & EF_ARM_SOFT_FLOAT) != (out_flags & EF_ARM_SOFT_FLOAT))
1006ba19 2261 {
5eefb65f
NC		 2262 if (in_flags & EF_ARM_SOFT_FLOAT)
2263 _bfd_error_handler (_ ("\
2264Error: %s uses software FP, whereas %s uses hardware FP"),
2265 bfd_archive_filename (ibfd),
2266 bfd_get_filename (obfd));
2267 else
2268 _bfd_error_handler (_ ("\
2269Error: %s uses hardware FP, whereas %s uses software FP"),
2270 bfd_archive_filename (ibfd),
2271 bfd_get_filename (obfd));
63b0f745 2272
1006ba19
PB		 2273 flags_compatible = false;
2274 }
ee43f35e 2275#endif
252b5132 2276
1006ba19 2277 /* Interworking mismatch is only a warning. */
fd2ec330 2278 if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
8f615d07 2279 {
e3c8793a
NC		 2280 if (in_flags & EF_ARM_INTERWORK)
2281 {
2282 _bfd_error_handler (_("\
2283Warning: %s supports interworking, whereas %s does not"),
2284 bfd_archive_filename (ibfd),
2285 bfd_get_filename (obfd));
2286 }
2287 else
2288 {
2289 _bfd_error_handler (_("\
2290Warning: %s does not support interworking, whereas %s does"),
2291 bfd_archive_filename (ibfd),
2292 bfd_get_filename (obfd));
2293 }
8f615d07 2294 }
252b5132 2295 }
63b0f745 2296
1006ba19 2297 return flags_compatible;
252b5132
RH		 2298}
2299
9b485d32
NC		 2300/* Display the flags field. */
2301
252b5132
RH		 2302static boolean
2303elf32_arm_print_private_bfd_data (abfd, ptr)
2304 bfd *abfd;
2305 PTR ptr;
2306{
fc830a83
NC		 2307 FILE * file = (FILE *) ptr;
2308 unsigned long flags;
252b5132
RH		 2309
2310 BFD_ASSERT (abfd != NULL && ptr != NULL);
2311
2312 /* Print normal ELF private data. */
2313 _bfd_elf_print_private_bfd_data (abfd, ptr);
2314
fc830a83 2315 flags = elf_elfheader (abfd)->e_flags;
9b485d32
NC		 2316 /* Ignore init flag - it may not be set, despite the flags field
2317 containing valid data. */
252b5132
RH		 2318
2319 /* xgettext:c-format */
9b485d32 2320 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
252b5132 2321
fc830a83
NC		 2322 switch (EF_ARM_EABI_VERSION (flags))
2323 {
2324 case EF_ARM_EABI_UNKNOWN:
2325 /* The following flag bits are GNU extenstions and not part of the
2326 official ARM ELF extended ABI. Hence they are only decoded if
2327 the EABI version is not set. */
fd2ec330 2328 if (flags & EF_ARM_INTERWORK)
9b485d32 2329 fprintf (file, _(" [interworking enabled]"));
9a5aca8c 2330
fd2ec330 2331 if (flags & EF_ARM_APCS_26)
9b485d32 2332 fprintf (file, _(" [APCS-26]"));
fc830a83 2333 else
9b485d32 2334 fprintf (file, _(" [APCS-32]"));
9a5aca8c 2335
fd2ec330 2336 if (flags & EF_ARM_APCS_FLOAT)
9b485d32 2337 fprintf (file, _(" [floats passed in float registers]"));
9a5aca8c 2338
fd2ec330 2339 if (flags & EF_ARM_PIC)
9b485d32 2340 fprintf (file, _(" [position independent]"));
fc830a83 2341
fd2ec330 2342 if (flags & EF_ARM_NEW_ABI)
9b485d32 2343 fprintf (file, _(" [new ABI]"));
9a5aca8c 2344
fd2ec330 2345 if (flags & EF_ARM_OLD_ABI)
9b485d32 2346 fprintf (file, _(" [old ABI]"));
9a5aca8c 2347
fd2ec330 2348 if (flags & EF_ARM_SOFT_FLOAT)
9b485d32 2349 fprintf (file, _(" [software FP]"));
9a5aca8c 2350
fd2ec330
PB		 2351 flags &= ~(EF_ARM_INTERWORK | EF_ARM_APCS_26 | EF_ARM_APCS_FLOAT | EF_ARM_PIC
2352 | EF_ARM_NEW_ABI | EF_ARM_OLD_ABI | EF_ARM_SOFT_FLOAT);
fc830a83 2353 break;
9a5aca8c 2354
fc830a83 2355 case EF_ARM_EABI_VER1:
9b485d32 2356 fprintf (file, _(" [Version1 EABI]"));
9a5aca8c 2357
fc830a83 2358 if (flags & EF_ARM_SYMSARESORTED)
9b485d32 2359 fprintf (file, _(" [sorted symbol table]"));
fc830a83 2360 else
9b485d32 2361 fprintf (file, _(" [unsorted symbol table]"));
9a5aca8c 2362
fc830a83
NC		 2363 flags &= ~ EF_ARM_SYMSARESORTED;
2364 break;
9a5aca8c 2365
fd2ec330
PB		 2366 case EF_ARM_EABI_VER2:
2367 fprintf (file, _(" [Version2 EABI]"));
2368
2369 if (flags & EF_ARM_SYMSARESORTED)
2370 fprintf (file, _(" [sorted symbol table]"));
2371 else
2372 fprintf (file, _(" [unsorted symbol table]"));
2373
2374 if (flags & EF_ARM_DYNSYMSUSESEGIDX)
2375 fprintf (file, _(" [dynamic symbols use segment index]"));
2376
2377 if (flags & EF_ARM_MAPSYMSFIRST)
2378 fprintf (file, _(" [mapping symbols precede others]"));
2379
99e4ae17 2380 flags &= ~(EF_ARM_SYMSARESORTED | EF_ARM_DYNSYMSUSESEGIDX
fd2ec330
PB		 2381 | EF_ARM_MAPSYMSFIRST);
2382 break;
2383
fc830a83 2384 default:
9b485d32 2385 fprintf (file, _(" <EABI version unrecognised>"));
fc830a83
NC		 2386 break;
2387 }
252b5132 2388
fc830a83 2389 flags &= ~ EF_ARM_EABIMASK;
252b5132 2390
fc830a83 2391 if (flags & EF_ARM_RELEXEC)
9b485d32 2392 fprintf (file, _(" [relocatable executable]"));
252b5132 2393
fc830a83 2394 if (flags & EF_ARM_HASENTRY)
9b485d32 2395 fprintf (file, _(" [has entry point]"));
252b5132 2396
fc830a83
NC		 2397 flags &= ~ (EF_ARM_RELEXEC | EF_ARM_HASENTRY);
2398
2399 if (flags)
9b485d32 2400 fprintf (file, _("<Unrecognised flag bits set>"));
9a5aca8c 2401
252b5132
RH		 2402 fputc ('\n', file);
2403
2404 return true;
2405}
2406
2407static int
2408elf32_arm_get_symbol_type (elf_sym, type)
2409 Elf_Internal_Sym * elf_sym;
2410 int type;
2411{
2f0ca46a
NC		 2412 switch (ELF_ST_TYPE (elf_sym->st_info))
2413 {
2414 case STT_ARM_TFUNC:
2415 return ELF_ST_TYPE (elf_sym->st_info);
ce855c42 2416
2f0ca46a
NC		 2417 case STT_ARM_16BIT:
2418 /* If the symbol is not an object, return the STT_ARM_16BIT flag.
2419 This allows us to distinguish between data used by Thumb instructions
2420 and non-data (which is probably code) inside Thumb regions of an
2421 executable. */
2422 if (type != STT_OBJECT)
2423 return ELF_ST_TYPE (elf_sym->st_info);
2424 break;
9a5aca8c 2425
ce855c42
NC		 2426 default:
2427 break;
2f0ca46a
NC		 2428 }
2429
2430 return type;
252b5132 2431}
f21f3fe0 2432
252b5132
RH		 2433static asection *
2434elf32_arm_gc_mark_hook (abfd, info, rel, h, sym)
2435 bfd *abfd;
5f771d47 2436 struct bfd_link_info *info ATTRIBUTE_UNUSED;
252b5132
RH		 2437 Elf_Internal_Rela *rel;
2438 struct elf_link_hash_entry *h;
2439 Elf_Internal_Sym *sym;
2440{
2441 if (h != NULL)
2442 {
2443 switch (ELF32_R_TYPE (rel->r_info))
2444 {
2445 case R_ARM_GNU_VTINHERIT:
2446 case R_ARM_GNU_VTENTRY:
2447 break;
2448
2449 default:
2450 switch (h->root.type)
2451 {
2452 case bfd_link_hash_defined:
2453 case bfd_link_hash_defweak:
2454 return h->root.u.def.section;
2455
2456 case bfd_link_hash_common:
2457 return h->root.u.c.p->section;
e049a0de
ILT		 2458
2459 default:
2460 break;
252b5132
RH		 2461 }
2462 }
2463 }
2464 else
2465 {
9ad5cbcf
AM		 2466 return bfd_section_from_elf_index (abfd, sym->st_shndx);
2467 }
2468
252b5132
RH		 2469 return NULL;
2470}
2471
780a67af
NC		 2472/* Update the got entry reference counts for the section being removed. */
2473
252b5132
RH		 2474static boolean
2475elf32_arm_gc_sweep_hook (abfd, info, sec, relocs)
5f771d47
ILT		 2476 bfd *abfd ATTRIBUTE_UNUSED;
2477 struct bfd_link_info *info ATTRIBUTE_UNUSED;
2478 asection *sec ATTRIBUTE_UNUSED;
2479 const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED;
252b5132 2480{
780a67af 2481 /* We don't support garbage collection of GOT and PLT relocs yet. */
252b5132
RH		 2482 return true;
2483}
2484
780a67af
NC		 2485/* Look through the relocs for a section during the first phase. */
2486
252b5132
RH		 2487static boolean
2488elf32_arm_check_relocs (abfd, info, sec, relocs)
2489 bfd * abfd;
2490 struct bfd_link_info * info;
2491 asection * sec;
2492 const Elf_Internal_Rela * relocs;
2493{
2494 Elf_Internal_Shdr * symtab_hdr;
2495 struct elf_link_hash_entry ** sym_hashes;
2496 struct elf_link_hash_entry ** sym_hashes_end;
2497 const Elf_Internal_Rela * rel;
2498 const Elf_Internal_Rela * rel_end;
2499 bfd * dynobj;
2500 asection * sgot, *srelgot, *sreloc;
2501 bfd_vma * local_got_offsets;
9a5aca8c 2502
252b5132
RH		 2503 if (info->relocateable)
2504 return true;
9a5aca8c 2505
252b5132 2506 sgot = srelgot = sreloc = NULL;
9a5aca8c 2507
252b5132
RH		 2508 dynobj = elf_hash_table (info)->dynobj;
2509 local_got_offsets = elf_local_got_offsets (abfd);
f21f3fe0 2510
252b5132
RH		 2511 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2512 sym_hashes = elf_sym_hashes (abfd);
9b485d32
NC		 2513 sym_hashes_end = sym_hashes
2514 + symtab_hdr->sh_size / sizeof (Elf32_External_Sym);
2515
252b5132
RH		 2516 if (!elf_bad_symtab (abfd))
2517 sym_hashes_end -= symtab_hdr->sh_info;
9b485d32 2518
252b5132
RH		 2519 rel_end = relocs + sec->reloc_count;
2520 for (rel = relocs; rel < rel_end; rel++)
2521 {
2522 struct elf_link_hash_entry *h;
2523 unsigned long r_symndx;
9a5aca8c 2524
252b5132
RH		 2525 r_symndx = ELF32_R_SYM (rel->r_info);
2526 if (r_symndx < symtab_hdr->sh_info)
2527 h = NULL;
2528 else
2529 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
9a5aca8c 2530
252b5132
RH		 2531 /* Some relocs require a global offset table. */
2532 if (dynobj == NULL)
2533 {
2534 switch (ELF32_R_TYPE (rel->r_info))
2535 {
2536 case R_ARM_GOT32:
2537 case R_ARM_GOTOFF:
2538 case R_ARM_GOTPC:
2539 elf_hash_table (info)->dynobj = dynobj = abfd;
2540 if (! _bfd_elf_create_got_section (dynobj, info))
2541 return false;
2542 break;
2543
2544 default:
2545 break;
2546 }
2547 }
2548
2549 switch (ELF32_R_TYPE (rel->r_info))
2550 {
2551 case R_ARM_GOT32:
2552 /* This symbol requires a global offset table entry. */
2553 if (sgot == NULL)
2554 {
2555 sgot = bfd_get_section_by_name (dynobj, ".got");
2556 BFD_ASSERT (sgot != NULL);
2557 }
2558
2559 /* Get the got relocation section if necessary. */
2560 if (srelgot == NULL
2561 && (h != NULL || info->shared))
2562 {
2563 srelgot = bfd_get_section_by_name (dynobj, ".rel.got");
9a5aca8c 2564
252b5132
RH		 2565 /* If no got relocation section, make one and initialize. */
2566 if (srelgot == NULL)
2567 {
2568 srelgot = bfd_make_section (dynobj, ".rel.got");
2569 if (srelgot == NULL
2570 || ! bfd_set_section_flags (dynobj, srelgot,
99e4ae17 2571 (SEC_ALLOC
252b5132
RH		 2572 | SEC_LOAD
2573 | SEC_HAS_CONTENTS
2574 | SEC_IN_MEMORY
2575 | SEC_LINKER_CREATED
2576 | SEC_READONLY))
2577 || ! bfd_set_section_alignment (dynobj, srelgot, 2))
2578 return false;
2579 }
2580 }
2581
2582 if (h != NULL)
2583 {
2584 if (h->got.offset != (bfd_vma) -1)
2585 /* We have already allocated space in the .got. */
2586 break;
f21f3fe0 2587
252b5132
RH		 2588 h->got.offset = sgot->_raw_size;
2589
2590 /* Make sure this symbol is output as a dynamic symbol. */
2591 if (h->dynindx == -1)
2592 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
2593 return false;
2594
2595 srelgot->_raw_size += sizeof (Elf32_External_Rel);
2596 }
2597 else
2598 {
99e4ae17 2599 /* This is a global offset table entry for a local
252b5132
RH		 2600 symbol. */
2601 if (local_got_offsets == NULL)
2602 {
dc810e39 2603 bfd_size_type size;
63b0f745 2604 unsigned int i;
252b5132 2605
dc810e39
AM		 2606 size = symtab_hdr->sh_info;
2607 size *= sizeof (bfd_vma);
252b5132
RH		 2608 local_got_offsets = (bfd_vma *) bfd_alloc (abfd, size);
2609 if (local_got_offsets == NULL)
2610 return false;
2611 elf_local_got_offsets (abfd) = local_got_offsets;
2612 for (i = 0; i < symtab_hdr->sh_info; i++)
2613 local_got_offsets[i] = (bfd_vma) -1;
2614 }
f21f3fe0 2615
252b5132
RH		 2616 if (local_got_offsets[r_symndx] != (bfd_vma) -1)
2617 /* We have already allocated space in the .got. */
2618 break;
2619
2620 local_got_offsets[r_symndx] = sgot->_raw_size;
2621
2622 if (info->shared)
2623 /* If we are generating a shared object, we need to
2624 output a R_ARM_RELATIVE reloc so that the dynamic
2625 linker can adjust this GOT entry. */
2626 srelgot->_raw_size += sizeof (Elf32_External_Rel);
2627 }
2628
2629 sgot->_raw_size += 4;
2630 break;
2631
99e4ae17 2632 case R_ARM_PLT32:
252b5132
RH		 2633 /* This symbol requires a procedure linkage table entry. We
2634 actually build the entry in adjust_dynamic_symbol,
2635 because this might be a case of linking PIC code which is
2636 never referenced by a dynamic object, in which case we
2637 don't need to generate a procedure linkage table entry
2638 after all. */
2639
2640 /* If this is a local symbol, we resolve it directly without
2641 creating a procedure linkage table entry. */
2642 if (h == NULL)
2643 continue;
2644
2645 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
2646 break;
2647
2648 case R_ARM_ABS32:
2649 case R_ARM_REL32:
2650 case R_ARM_PC24:
2651 /* If we are creating a shared library, and this is a reloc
2652 against a global symbol, or a non PC relative reloc
2653 against a local symbol, then we need to copy the reloc
2654 into the shared library. However, if we are linking with
2655 -Bsymbolic, we do not need to copy a reloc against a
2656 global symbol which is defined in an object we are
2657 including in the link (i.e., DEF_REGULAR is set). At
2658 this point we have not seen all the input files, so it is
2659 possible that DEF_REGULAR is not set now but will be set
2660 later (it is never cleared). We account for that
2661 possibility below by storing information in the
2662 pcrel_relocs_copied field of the hash table entry. */
2663 if (info->shared
2664 && (ELF32_R_TYPE (rel->r_info) != R_ARM_PC24
2665 || (h != NULL
2666 && (! info->symbolic
2667 || (h->elf_link_hash_flags
2668 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
2669 {
2670 /* When creating a shared object, we must copy these
2671 reloc types into the output file. We create a reloc
2672 section in dynobj and make room for this reloc. */
2673 if (sreloc == NULL)
2674 {
2675 const char * name;
2676
2677 name = (bfd_elf_string_from_elf_section
2678 (abfd,
2679 elf_elfheader (abfd)->e_shstrndx,
2680 elf_section_data (sec)->rel_hdr.sh_name));
2681 if (name == NULL)
2682 return false;
2683
2684 BFD_ASSERT (strncmp (name, ".rel", 4) == 0
99e4ae17 2685 && strcmp (bfd_get_section_name (abfd, sec),
252b5132
RH		 2686 name + 4) == 0);
2687
2688 sreloc = bfd_get_section_by_name (dynobj, name);
2689 if (sreloc == NULL)
2690 {
2691 flagword flags;
2692
2693 sreloc = bfd_make_section (dynobj, name);
2694 flags = (SEC_HAS_CONTENTS | SEC_READONLY
2695 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2696 if ((sec->flags & SEC_ALLOC) != 0)
2697 flags |= SEC_ALLOC | SEC_LOAD;
2698 if (sreloc == NULL
2699 || ! bfd_set_section_flags (dynobj, sreloc, flags)
2700 || ! bfd_set_section_alignment (dynobj, sreloc, 2))
2701 return false;
2702 }
99e4ae17
AJ		 2703 if (sec->flags & SEC_READONLY)
2704 info->flags |= DF_TEXTREL;
252b5132
RH		 2705 }
2706
2707 sreloc->_raw_size += sizeof (Elf32_External_Rel);
2708 /* If we are linking with -Bsymbolic, and this is a
2709 global symbol, we count the number of PC relative
2710 relocations we have entered for this symbol, so that
2711 we can discard them again if the symbol is later
2712 defined by a regular object. Note that this function
2713 is only called if we are using an elf_i386 linker
2714 hash table, which means that h is really a pointer to
2715 an elf_i386_link_hash_entry. */
2716 if (h != NULL && info->symbolic
2717 && ELF32_R_TYPE (rel->r_info) == R_ARM_PC24)
2718 {
2719 struct elf32_arm_link_hash_entry * eh;
2720 struct elf32_arm_pcrel_relocs_copied * p;
2721
2722 eh = (struct elf32_arm_link_hash_entry *) h;
2723
2724 for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
2725 if (p->section == sreloc)
2726 break;
2727
2728 if (p == NULL)
2729 {
2730 p = ((struct elf32_arm_pcrel_relocs_copied *)
dc810e39 2731 bfd_alloc (dynobj, (bfd_size_type) sizeof * p));
252b5132
RH		 2732 if (p == NULL)
2733 return false;
2734 p->next = eh->pcrel_relocs_copied;
2735 eh->pcrel_relocs_copied = p;
2736 p->section = sreloc;
2737 p->count = 0;
2738 }
2739
2740 ++p->count;
2741 }
2742 }
2743 break;
2744
2745 /* This relocation describes the C++ object vtable hierarchy.
2746 Reconstruct it for later use during GC. */
2747 case R_ARM_GNU_VTINHERIT:
2748 if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
2749 return false;
2750 break;
9a5aca8c 2751
252b5132
RH		 2752 /* This relocation describes which C++ vtable entries are actually
2753 used. Record for later use during GC. */
2754 case R_ARM_GNU_VTENTRY:
d512aa07 2755 if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_offset))
252b5132
RH		 2756 return false;
2757 break;
2758 }
2759 }
f21f3fe0 2760
252b5132
RH		 2761 return true;
2762}
2763
252b5132
RH		 2764/* Find the nearest line to a particular section and offset, for error
2765 reporting. This code is a duplicate of the code in elf.c, except
9b485d32 2766 that it also accepts STT_ARM_TFUNC as a symbol that names a function. */
252b5132
RH		 2767
2768static boolean
2769elf32_arm_find_nearest_line
2770 (abfd, section, symbols, offset, filename_ptr, functionname_ptr, line_ptr)
2771 bfd * abfd;
2772 asection * section;
2773 asymbol ** symbols;
2774 bfd_vma offset;
917583ad
NC		 2775 const char ** filename_ptr;
2776 const char ** functionname_ptr;
252b5132
RH		 2777 unsigned int * line_ptr;
2778{
2779 boolean found;
2780 const char * filename;
2781 asymbol * func;
2782 bfd_vma low_func;
2783 asymbol ** p;
2784
2785 if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
f21f3fe0 2786 filename_ptr, functionname_ptr,
857ec808
NC		 2787 line_ptr, 0,
2788 &elf_tdata (abfd)->dwarf2_find_line_info))
252b5132
RH		 2789 return true;
2790
2791 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
2792 &found, filename_ptr,
2793 functionname_ptr, line_ptr,
2794 &elf_tdata (abfd)->line_info))
2795 return false;
f21f3fe0 2796
252b5132
RH		 2797 if (found)
2798 return true;
2799
2800 if (symbols == NULL)
2801 return false;
2802
2803 filename = NULL;
2804 func = NULL;
2805 low_func = 0;
2806
2807 for (p = symbols; *p != NULL; p++)
2808 {
2809 elf_symbol_type *q;
2810
2811 q = (elf_symbol_type *) *p;
2812
2813 if (bfd_get_section (&q->symbol) != section)
2814 continue;
2815
2816 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
2817 {
2818 default:
2819 break;
2820 case STT_FILE:
2821 filename = bfd_asymbol_name (&q->symbol);
2822 break;
2823 case STT_NOTYPE:
2824 case STT_FUNC:
2825 case STT_ARM_TFUNC:
2826 if (q->symbol.section == section
2827 && q->symbol.value >= low_func
2828 && q->symbol.value <= offset)
2829 {
2830 func = (asymbol *) q;
2831 low_func = q->symbol.value;
2832 }
2833 break;
2834 }
2835 }
2836
2837 if (func == NULL)
2838 return false;
2839
2840 *filename_ptr = filename;
2841 *functionname_ptr = bfd_asymbol_name (func);
2842 *line_ptr = 0;
f21f3fe0 2843
252b5132
RH		 2844 return true;
2845}
2846
2847/* Adjust a symbol defined by a dynamic object and referenced by a
2848 regular object. The current definition is in some section of the
2849 dynamic object, but we're not including those sections. We have to
2850 change the definition to something the rest of the link can
2851 understand. */
2852
2853static boolean
2854elf32_arm_adjust_dynamic_symbol (info, h)
2855 struct bfd_link_info * info;
2856 struct elf_link_hash_entry * h;
2857{
2858 bfd * dynobj;
2859 asection * s;
2860 unsigned int power_of_two;
2861
2862 dynobj = elf_hash_table (info)->dynobj;
2863
2864 /* Make sure we know what is going on here. */
2865 BFD_ASSERT (dynobj != NULL
2866 && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT)
2867 || h->weakdef != NULL
2868 || ((h->elf_link_hash_flags
2869 & ELF_LINK_HASH_DEF_DYNAMIC) != 0
2870 && (h->elf_link_hash_flags
2871 & ELF_LINK_HASH_REF_REGULAR) != 0
2872 && (h->elf_link_hash_flags
2873 & ELF_LINK_HASH_DEF_REGULAR) == 0)));
2874
2875 /* If this is a function, put it in the procedure linkage table. We
2876 will fill in the contents of the procedure linkage table later,
2877 when we know the address of the .got section. */
2878 if (h->type == STT_FUNC
2879 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
2880 {
2881 if (! info->shared
2882 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0
2883 && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0)
2884 {
2885 /* This case can occur if we saw a PLT32 reloc in an input
2886 file, but the symbol was never referred to by a dynamic
2887 object. In such a case, we don't actually need to build
2888 a procedure linkage table, and we can just do a PC32
2889 reloc instead. */
2890 BFD_ASSERT ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0);
2891 return true;
2892 }
2893
2894 /* Make sure this symbol is output as a dynamic symbol. */
2895 if (h->dynindx == -1)
2896 {
2897 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
2898 return false;
2899 }
2900
2901 s = bfd_get_section_by_name (dynobj, ".plt");
2902 BFD_ASSERT (s != NULL);
2903
2904 /* If this is the first .plt entry, make room for the special
2905 first entry. */
2906 if (s->_raw_size == 0)
2907 s->_raw_size += PLT_ENTRY_SIZE;
2908
2909 /* If this symbol is not defined in a regular file, and we are
2910 not generating a shared library, then set the symbol to this
2911 location in the .plt. This is required to make function
2912 pointers compare as equal between the normal executable and
2913 the shared library. */
2914 if (! info->shared
2915 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
2916 {
2917 h->root.u.def.section = s;
2918 h->root.u.def.value = s->_raw_size;
2919 }
2920
2921 h->plt.offset = s->_raw_size;
2922
2923 /* Make room for this entry. */
2924 s->_raw_size += PLT_ENTRY_SIZE;
2925
2926 /* We also need to make an entry in the .got.plt section, which
2927 will be placed in the .got section by the linker script. */
252b5132
RH		 2928 s = bfd_get_section_by_name (dynobj, ".got.plt");
2929 BFD_ASSERT (s != NULL);
2930 s->_raw_size += 4;
2931
2932 /* We also need to make an entry in the .rel.plt section. */
2933
2934 s = bfd_get_section_by_name (dynobj, ".rel.plt");
2935 BFD_ASSERT (s != NULL);
2936 s->_raw_size += sizeof (Elf32_External_Rel);
2937
2938 return true;
2939 }
2940
2941 /* If this is a weak symbol, and there is a real definition, the
2942 processor independent code will have arranged for us to see the
2943 real definition first, and we can just use the same value. */
2944 if (h->weakdef != NULL)
2945 {
2946 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
2947 || h->weakdef->root.type == bfd_link_hash_defweak);
2948 h->root.u.def.section = h->weakdef->root.u.def.section;
2949 h->root.u.def.value = h->weakdef->root.u.def.value;
2950 return true;
2951 }
2952
2953 /* This is a reference to a symbol defined by a dynamic object which
2954 is not a function. */
2955
2956 /* If we are creating a shared library, we must presume that the
2957 only references to the symbol are via the global offset table.
2958 For such cases we need not do anything here; the relocations will
2959 be handled correctly by relocate_section. */
2960 if (info->shared)
2961 return true;
2962
2963 /* We must allocate the symbol in our .dynbss section, which will
2964 become part of the .bss section of the executable. There will be
2965 an entry for this symbol in the .dynsym section. The dynamic
2966 object will contain position independent code, so all references
2967 from the dynamic object to this symbol will go through the global
2968 offset table. The dynamic linker will use the .dynsym entry to
2969 determine the address it must put in the global offset table, so
2970 both the dynamic object and the regular object will refer to the
2971 same memory location for the variable. */
252b5132
RH		 2972 s = bfd_get_section_by_name (dynobj, ".dynbss");
2973 BFD_ASSERT (s != NULL);
2974
2975 /* We must generate a R_ARM_COPY reloc to tell the dynamic linker to
2976 copy the initial value out of the dynamic object and into the
2977 runtime process image. We need to remember the offset into the
2978 .rel.bss section we are going to use. */
2979 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
2980 {
2981 asection *srel;
2982
2983 srel = bfd_get_section_by_name (dynobj, ".rel.bss");
2984 BFD_ASSERT (srel != NULL);
2985 srel->_raw_size += sizeof (Elf32_External_Rel);
2986 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
2987 }
2988
2989 /* We need to figure out the alignment required for this symbol. I
2990 have no idea how ELF linkers handle this. */
2991 power_of_two = bfd_log2 (h->size);
2992 if (power_of_two > 3)
2993 power_of_two = 3;
2994
2995 /* Apply the required alignment. */
2996 s->_raw_size = BFD_ALIGN (s->_raw_size,
2997 (bfd_size_type) (1 << power_of_two));
2998 if (power_of_two > bfd_get_section_alignment (dynobj, s))
2999 {
3000 if (! bfd_set_section_alignment (dynobj, s, power_of_two))
3001 return false;
3002 }
3003
3004 /* Define the symbol as being at this point in the section. */
3005 h->root.u.def.section = s;
3006 h->root.u.def.value = s->_raw_size;
3007
3008 /* Increment the section size to make room for the symbol. */
3009 s->_raw_size += h->size;
3010
3011 return true;
3012}
3013
3014/* Set the sizes of the dynamic sections. */
3015
3016static boolean
3017elf32_arm_size_dynamic_sections (output_bfd, info)
99e4ae17 3018 bfd * output_bfd ATTRIBUTE_UNUSED;
252b5132
RH		 3019 struct bfd_link_info * info;
3020{
3021 bfd * dynobj;
3022 asection * s;
3023 boolean plt;
3024 boolean relocs;
252b5132
RH		 3025
3026 dynobj = elf_hash_table (info)->dynobj;
3027 BFD_ASSERT (dynobj != NULL);
3028
3029 if (elf_hash_table (info)->dynamic_sections_created)
3030 {
3031 /* Set the contents of the .interp section to the interpreter. */
3032 if (! info->shared)
3033 {
3034 s = bfd_get_section_by_name (dynobj, ".interp");
3035 BFD_ASSERT (s != NULL);
3036 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
3037 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
3038 }
3039 }
3040 else
3041 {
3042 /* We may have created entries in the .rel.got section.
3043 However, if we are not creating the dynamic sections, we will
3044 not actually use these entries. Reset the size of .rel.got,
3045 which will cause it to get stripped from the output file
3046 below. */
3047 s = bfd_get_section_by_name (dynobj, ".rel.got");
3048 if (s != NULL)
3049 s->_raw_size = 0;
3050 }
3051
3052 /* If this is a -Bsymbolic shared link, then we need to discard all
3053 PC relative relocs against symbols defined in a regular object.
3054 We allocated space for them in the check_relocs routine, but we
3055 will not fill them in in the relocate_section routine. */
3056 if (info->shared && info->symbolic)
3057 elf32_arm_link_hash_traverse (elf32_arm_hash_table (info),
3058 elf32_arm_discard_copies,
3059 (PTR) NULL);
3060
3061 /* The check_relocs and adjust_dynamic_symbol entry points have
3062 determined the sizes of the various dynamic sections. Allocate
3063 memory for them. */
3064 plt = false;
3065 relocs = false;
252b5132
RH		 3066 for (s = dynobj->sections; s != NULL; s = s->next)
3067 {
3068 const char * name;
3069 boolean strip;
3070
3071 if ((s->flags & SEC_LINKER_CREATED) == 0)
3072 continue;
3073
3074 /* It's OK to base decisions on the section name, because none
3075 of the dynobj section names depend upon the input files. */
3076 name = bfd_get_section_name (dynobj, s);
3077
3078 strip = false;
3079
3080 if (strcmp (name, ".plt") == 0)
3081 {
3082 if (s->_raw_size == 0)
3083 {
3084 /* Strip this section if we don't need it; see the
3085 comment below. */
3086 strip = true;
3087 }
3088 else
3089 {
3090 /* Remember whether there is a PLT. */
3091 plt = true;
3092 }
3093 }
3094 else if (strncmp (name, ".rel", 4) == 0)
3095 {
3096 if (s->_raw_size == 0)
3097 {
3098 /* If we don't need this section, strip it from the
3099 output file. This is mostly to handle .rel.bss and
3100 .rel.plt. We must create both sections in
3101 create_dynamic_sections, because they must be created
3102 before the linker maps input sections to output
3103 sections. The linker does that before
3104 adjust_dynamic_symbol is called, and it is that
3105 function which decides whether anything needs to go
3106 into these sections. */
3107 strip = true;
3108 }
3109 else
3110 {
252b5132
RH		 3111 /* Remember whether there are any reloc sections other
3112 than .rel.plt. */
3113 if (strcmp (name, ".rel.plt") != 0)
99e4ae17 3114 relocs = true;
252b5132
RH		 3115
3116 /* We use the reloc_count field as a counter if we need
3117 to copy relocs into the output file. */
3118 s->reloc_count = 0;
3119 }
3120 }
3121 else if (strncmp (name, ".got", 4) != 0)
3122 {
3123 /* It's not one of our sections, so don't allocate space. */
3124 continue;
3125 }
3126
3127 if (strip)
3128 {
3129 asection ** spp;
3130
3131 for (spp = &s->output_section->owner->sections;
3132 *spp != s->output_section;
3133 spp = &(*spp)->next)
3134 ;
3135 *spp = s->output_section->next;
3136 --s->output_section->owner->section_count;
3137
3138 continue;
3139 }
3140
3141 /* Allocate memory for the section contents. */
3142 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size);
3143 if (s->contents == NULL && s->_raw_size != 0)
3144 return false;
3145 }
3146
3147 if (elf_hash_table (info)->dynamic_sections_created)
3148 {
3149 /* Add some entries to the .dynamic section. We fill in the
3150 values later, in elf32_arm_finish_dynamic_sections, but we
3151 must add the entries now so that we get the correct size for
3152 the .dynamic section. The DT_DEBUG entry is filled in by the
3153 dynamic linker and used by the debugger. */
dc810e39
AM		 3154#define add_dynamic_entry(TAG, VAL) \
3155 bfd_elf32_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL))
3156
3157 if (!info->shared)
252b5132 3158 {
dc810e39 3159 if (!add_dynamic_entry (DT_DEBUG, 0))
252b5132
RH		 3160 return false;
3161 }
3162
3163 if (plt)
3164 {
dc810e39
AM		 3165 if ( !add_dynamic_entry (DT_PLTGOT, 0)
3166 || !add_dynamic_entry (DT_PLTRELSZ, 0)
3167 || !add_dynamic_entry (DT_PLTREL, DT_REL)
3168 || !add_dynamic_entry (DT_JMPREL, 0))
252b5132
RH		 3169 return false;
3170 }
3171
3172 if (relocs)
3173 {
dc810e39
AM		 3174 if ( !add_dynamic_entry (DT_REL, 0)
3175 || !add_dynamic_entry (DT_RELSZ, 0)
3176 || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel)))
252b5132
RH		 3177 return false;
3178 }
3179
99e4ae17 3180 if ((info->flags & DF_TEXTREL) != 0)
252b5132 3181 {
dc810e39 3182 if (!add_dynamic_entry (DT_TEXTREL, 0))
252b5132 3183 return false;
d6cf2879 3184 info->flags |= DF_TEXTREL;
252b5132
RH		 3185 }
3186 }
dc810e39 3187#undef add_synamic_entry
252b5132
RH		 3188
3189 return true;
3190}
3191
3192/* This function is called via elf32_arm_link_hash_traverse if we are
3193 creating a shared object with -Bsymbolic. It discards the space
3194 allocated to copy PC relative relocs against symbols which are
3195 defined in regular objects. We allocated space for them in the
3196 check_relocs routine, but we won't fill them in in the
3197 relocate_section routine. */
3198
3199static boolean
3200elf32_arm_discard_copies (h, ignore)
3201 struct elf32_arm_link_hash_entry * h;
5f771d47 3202 PTR ignore ATTRIBUTE_UNUSED;
252b5132
RH		 3203{
3204 struct elf32_arm_pcrel_relocs_copied * s;
3205
3206 /* We only discard relocs for symbols defined in a regular object. */
3207 if ((h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
3208 return true;
3209
3210 for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
3211 s->section->_raw_size -= s->count * sizeof (Elf32_External_Rel);
3212
3213 return true;
3214}
3215
3216/* Finish up dynamic symbol handling. We set the contents of various
3217 dynamic sections here. */
3218
3219static boolean
3220elf32_arm_finish_dynamic_symbol (output_bfd, info, h, sym)
3221 bfd * output_bfd;
3222 struct bfd_link_info * info;
3223 struct elf_link_hash_entry * h;
3224 Elf_Internal_Sym * sym;
3225{
3226 bfd * dynobj;
3227
3228 dynobj = elf_hash_table (info)->dynobj;
3229
3230 if (h->plt.offset != (bfd_vma) -1)
3231 {
3232 asection * splt;
3233 asection * sgot;
3234 asection * srel;
3235 bfd_vma plt_index;
3236 bfd_vma got_offset;
3237 Elf_Internal_Rel rel;
3238
3239 /* This symbol has an entry in the procedure linkage table. Set
3240 it up. */
3241
3242 BFD_ASSERT (h->dynindx != -1);
3243
3244 splt = bfd_get_section_by_name (dynobj, ".plt");
3245 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
3246 srel = bfd_get_section_by_name (dynobj, ".rel.plt");
3247 BFD_ASSERT (splt != NULL && sgot != NULL && srel != NULL);
3248
3249 /* Get the index in the procedure linkage table which
3250 corresponds to this symbol. This is the index of this symbol
3251 in all the symbols for which we are making plt entries. The
3252 first entry in the procedure linkage table is reserved. */
3253 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
3254
3255 /* Get the offset into the .got table of the entry that
3256 corresponds to this function. Each .got entry is 4 bytes.
3257 The first three are reserved. */
3258 got_offset = (plt_index + 3) * 4;
3259
3260 /* Fill in the entry in the procedure linkage table. */
f7a74f8c
NC		 3261 bfd_put_32 (output_bfd, elf32_arm_plt_entry[0],
3262 splt->contents + h->plt.offset + 0);
3263 bfd_put_32 (output_bfd, elf32_arm_plt_entry[1],
3264 splt->contents + h->plt.offset + 4);
3265 bfd_put_32 (output_bfd, elf32_arm_plt_entry[2],
3266 splt->contents + h->plt.offset + 8);
252b5132
RH		 3267 bfd_put_32 (output_bfd,
3268 (sgot->output_section->vma
3269 + sgot->output_offset
f21f3fe0 3270 + got_offset
252b5132
RH		 3271 - splt->output_section->vma
3272 - splt->output_offset
3273 - h->plt.offset - 12),
3274 splt->contents + h->plt.offset + 12);
3275
3276 /* Fill in the entry in the global offset table. */
3277 bfd_put_32 (output_bfd,
3278 (splt->output_section->vma
3279 + splt->output_offset),
3280 sgot->contents + got_offset);
3281
3282 /* Fill in the entry in the .rel.plt section. */
3283 rel.r_offset = (sgot->output_section->vma
3284 + sgot->output_offset
3285 + got_offset);
3286 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_JUMP_SLOT);
3287 bfd_elf32_swap_reloc_out (output_bfd, &rel,
3288 ((Elf32_External_Rel *) srel->contents
3289 + plt_index));
3290
3291 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
3292 {
3293 /* Mark the symbol as undefined, rather than as defined in
3294 the .plt section. Leave the value alone. */
3295 sym->st_shndx = SHN_UNDEF;
d982ba73
PB		 3296 /* If the symbol is weak, we do need to clear the value.
3297 Otherwise, the PLT entry would provide a definition for
3298 the symbol even if the symbol wasn't defined anywhere,
3299 and so the symbol would never be NULL. */
3300 if ((h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR_NONWEAK)
3301 == 0)
3302 sym->st_value = 0;
252b5132
RH		 3303 }
3304 }
3305
3306 if (h->got.offset != (bfd_vma) -1)
3307 {
3308 asection * sgot;
3309 asection * srel;
3310 Elf_Internal_Rel rel;
3311
3312 /* This symbol has an entry in the global offset table. Set it
3313 up. */
252b5132
RH		 3314 sgot = bfd_get_section_by_name (dynobj, ".got");
3315 srel = bfd_get_section_by_name (dynobj, ".rel.got");
3316 BFD_ASSERT (sgot != NULL && srel != NULL);
3317
3318 rel.r_offset = (sgot->output_section->vma
3319 + sgot->output_offset
dc810e39 3320 + (h->got.offset &~ (bfd_vma) 1));
252b5132
RH		 3321
3322 /* If this is a -Bsymbolic link, and the symbol is defined
3323 locally, we just want to emit a RELATIVE reloc. The entry in
3324 the global offset table will already have been initialized in
3325 the relocate_section function. */
3326 if (info->shared
3327 && (info->symbolic || h->dynindx == -1)
3328 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))
3329 rel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
3330 else
3331 {
3332 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset);
3333 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT);
3334 }
3335
3336 bfd_elf32_swap_reloc_out (output_bfd, &rel,
3337 ((Elf32_External_Rel *) srel->contents
3338 + srel->reloc_count));
3339 ++srel->reloc_count;
3340 }
3341
3342 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
3343 {
3344 asection * s;
3345 Elf_Internal_Rel rel;
3346
3347 /* This symbol needs a copy reloc. Set it up. */
252b5132
RH		 3348 BFD_ASSERT (h->dynindx != -1
3349 && (h->root.type == bfd_link_hash_defined
3350 || h->root.type == bfd_link_hash_defweak));
3351
3352 s = bfd_get_section_by_name (h->root.u.def.section->owner,
3353 ".rel.bss");
3354 BFD_ASSERT (s != NULL);
3355
3356 rel.r_offset = (h->root.u.def.value
3357 + h->root.u.def.section->output_section->vma
3358 + h->root.u.def.section->output_offset);
3359 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_COPY);
3360 bfd_elf32_swap_reloc_out (output_bfd, &rel,
3361 ((Elf32_External_Rel *) s->contents
3362 + s->reloc_count));
3363 ++s->reloc_count;
3364 }
3365
3366 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
3367 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
3368 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3369 sym->st_shndx = SHN_ABS;
3370
3371 return true;
3372}
3373
3374/* Finish up the dynamic sections. */
3375
3376static boolean
3377elf32_arm_finish_dynamic_sections (output_bfd, info)
3378 bfd * output_bfd;
3379 struct bfd_link_info * info;
3380{
3381 bfd * dynobj;
3382 asection * sgot;
3383 asection * sdyn;
3384
3385 dynobj = elf_hash_table (info)->dynobj;
3386
3387 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
3388 BFD_ASSERT (sgot != NULL);
3389 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
3390
3391 if (elf_hash_table (info)->dynamic_sections_created)
3392 {
3393 asection *splt;
3394 Elf32_External_Dyn *dyncon, *dynconend;
3395
3396 splt = bfd_get_section_by_name (dynobj, ".plt");
3397 BFD_ASSERT (splt != NULL && sdyn != NULL);
3398
3399 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3400 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
9b485d32 3401
252b5132
RH		 3402 for (; dyncon < dynconend; dyncon++)
3403 {
3404 Elf_Internal_Dyn dyn;
3405 const char * name;
3406 asection * s;
3407
3408 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3409
3410 switch (dyn.d_tag)
3411 {
3412 default:
3413 break;
3414
3415 case DT_PLTGOT:
3416 name = ".got";
3417 goto get_vma;
3418 case DT_JMPREL:
3419 name = ".rel.plt";
3420 get_vma:
3421 s = bfd_get_section_by_name (output_bfd, name);
3422 BFD_ASSERT (s != NULL);
3423 dyn.d_un.d_ptr = s->vma;
3424 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3425 break;
3426
3427 case DT_PLTRELSZ:
3428 s = bfd_get_section_by_name (output_bfd, ".rel.plt");
3429 BFD_ASSERT (s != NULL);
3430 if (s->_cooked_size != 0)
3431 dyn.d_un.d_val = s->_cooked_size;
3432 else
3433 dyn.d_un.d_val = s->_raw_size;
3434 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3435 break;
3436
3437 case DT_RELSZ:
3438 /* My reading of the SVR4 ABI indicates that the
3439 procedure linkage table relocs (DT_JMPREL) should be
3440 included in the overall relocs (DT_REL). This is
3441 what Solaris does. However, UnixWare can not handle
3442 that case. Therefore, we override the DT_RELSZ entry
3443 here to make it not include the JMPREL relocs. Since
3444 the linker script arranges for .rel.plt to follow all
3445 other relocation sections, we don't have to worry
3446 about changing the DT_REL entry. */
3447 s = bfd_get_section_by_name (output_bfd, ".rel.plt");
3448 if (s != NULL)
3449 {
3450 if (s->_cooked_size != 0)
3451 dyn.d_un.d_val -= s->_cooked_size;
3452 else
3453 dyn.d_un.d_val -= s->_raw_size;
3454 }
3455 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3456 break;
3457 }
3458 }
3459
3460 /* Fill in the first entry in the procedure linkage table. */
3461 if (splt->_raw_size > 0)
f7a74f8c
NC		 3462 {
3463 bfd_put_32 (output_bfd, elf32_arm_plt0_entry[0], splt->contents + 0);
3464 bfd_put_32 (output_bfd, elf32_arm_plt0_entry[1], splt->contents + 4);
3465 bfd_put_32 (output_bfd, elf32_arm_plt0_entry[2], splt->contents + 8);
3466 bfd_put_32 (output_bfd, elf32_arm_plt0_entry[3], splt->contents + 12);
3467 }
252b5132
RH		 3468
3469 /* UnixWare sets the entsize of .plt to 4, although that doesn't
3470 really seem like the right value. */
3471 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4;
3472 }
3473
3474 /* Fill in the first three entries in the global offset table. */
3475 if (sgot->_raw_size > 0)
3476 {
3477 if (sdyn == NULL)
3478 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
3479 else
3480 bfd_put_32 (output_bfd,
3481 sdyn->output_section->vma + sdyn->output_offset,
3482 sgot->contents);
3483 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
3484 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
3485 }
3486
3487 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
3488
3489 return true;
3490}
3491
ba96a88f
NC		 3492static void
3493elf32_arm_post_process_headers (abfd, link_info)
3494 bfd * abfd;
5f771d47 3495 struct bfd_link_info * link_info ATTRIBUTE_UNUSED;
ba96a88f 3496{
9b485d32 3497 Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
ba96a88f
NC		 3498
3499 i_ehdrp = elf_elfheader (abfd);
3500
3501 i_ehdrp->e_ident[EI_OSABI] = ARM_ELF_OS_ABI_VERSION;
3502 i_ehdrp->e_ident[EI_ABIVERSION] = ARM_ELF_ABI_VERSION;
3503}
3504
99e4ae17 3505static enum elf_reloc_type_class
f51e552e
AM		 3506elf32_arm_reloc_type_class (rela)
3507 const Elf_Internal_Rela *rela;
99e4ae17 3508{
f51e552e 3509 switch ((int) ELF32_R_TYPE (rela->r_info))
99e4ae17
AJ		 3510 {
3511 case R_ARM_RELATIVE:
3512 return reloc_class_relative;
3513 case R_ARM_JUMP_SLOT:
3514 return reloc_class_plt;
3515 case R_ARM_COPY:
3516 return reloc_class_copy;
3517 default:
3518 return reloc_class_normal;
3519 }
3520}
3521
3522
252b5132
RH		 3523#define ELF_ARCH bfd_arch_arm
3524#define ELF_MACHINE_CODE EM_ARM
f21f3fe0 3525#define ELF_MAXPAGESIZE 0x8000
252b5132 3526
99e4ae17
AJ		 3527#define bfd_elf32_bfd_copy_private_bfd_data elf32_arm_copy_private_bfd_data
3528#define bfd_elf32_bfd_merge_private_bfd_data elf32_arm_merge_private_bfd_data
252b5132
RH		 3529#define bfd_elf32_bfd_set_private_flags elf32_arm_set_private_flags
3530#define bfd_elf32_bfd_print_private_bfd_data elf32_arm_print_private_bfd_data
3531#define bfd_elf32_bfd_link_hash_table_create elf32_arm_link_hash_table_create
dc810e39 3532#define bfd_elf32_bfd_reloc_type_lookup elf32_arm_reloc_type_lookup
252b5132
RH		 3533#define bfd_elf32_find_nearest_line elf32_arm_find_nearest_line
3534
3535#define elf_backend_get_symbol_type elf32_arm_get_symbol_type
3536#define elf_backend_gc_mark_hook elf32_arm_gc_mark_hook
3537#define elf_backend_gc_sweep_hook elf32_arm_gc_sweep_hook
3538#define elf_backend_check_relocs elf32_arm_check_relocs
dc810e39 3539#define elf_backend_relocate_section elf32_arm_relocate_section
252b5132
RH		 3540#define elf_backend_adjust_dynamic_symbol elf32_arm_adjust_dynamic_symbol
3541#define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
3542#define elf_backend_finish_dynamic_symbol elf32_arm_finish_dynamic_symbol
3543#define elf_backend_finish_dynamic_sections elf32_arm_finish_dynamic_sections
3544#define elf_backend_size_dynamic_sections elf32_arm_size_dynamic_sections
ba96a88f 3545#define elf_backend_post_process_headers elf32_arm_post_process_headers
99e4ae17 3546#define elf_backend_reloc_type_class elf32_arm_reloc_type_class
252b5132
RH		 3547
3548#define elf_backend_can_gc_sections 1
3549#define elf_backend_plt_readonly 1
3550#define elf_backend_want_got_plt 1
3551#define elf_backend_want_plt_sym 0
3552
04f7c78d
NC		 3553#define elf_backend_got_header_size 12
3554#define elf_backend_plt_header_size PLT_ENTRY_SIZE
3555
252b5132 3556#include "elf32-target.h"
GDB Binutils - Deliverables
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